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Showing 361 - 380 of 501 results

Celebrating the Federal Investment in Mass Transit: A Report to Our Customers

United States. Department of Transportation. Federal Transit Administration

2000-01-01 | PDF

Report from the Federal Transit Administration on the achievements of the Federal transit program and benefits of public transit.

08/10/2026

Title : Celebrating the Federal Investment in Mass Transit: A Report to Our Customers Corporate Creator(s) : United States. Department of Transportation. Federal Transit Administration Contributor(s) : Fernandez, Nuria I. Published Date : 2000-01-01 DOI : https://doi.org/10.21949/1530422
United States. Department of Transportation. Federal Transit Administration (2000). Celebrating the Federal Investment in Mass Transit: A Report to Our Customers. United States. Department of Transportation. Federal Transit Administration. https://doi.org/10.21949/1530422

United States. Department of Transportation. Federal Transit Administration. Celebrating the Federal Investment in Mass Transit: A Report to Our Customers. United States. Department of Transportation. Federal Transit Administration, 2000. https://doi.org/10.21949/1530422.

United States. Department of Transportation. Federal Transit Administration Celebrating the Federal Investment in Mass Transit: A Report to Our Customers. United States. Department of Transportation. Federal Transit Administration, 2000, ROSA P. https://doi.org/10.21949/1530422.
Export RIS Citation Information. TY - Booklet/Pamphlet A2 - United States. Department of Transportation. Federal Transit Administration AB - Report from the Federal Transit Administration on the achievements of the Federal transit program and benefits of public transit. AN - dot:92861 DA - 2000-01-01 DO - https://doi.org/10.21949/1530422 KW - Public transit KW - Federal government agencies KW - Federal assistance programs KW - Government funding KW - Livability KW - Economic and social factors LA - English PB - United States. Department of Transportation. Federal Transit Administration PY - 2000 TI - Celebrating the Federal Investment in Mass Transit: A Report to Our Customers M3 - Booklet/Pamphlet N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92861 ER -
Design/Build: A New Approach

United States. Department of Transportation. Federal Transit Administration

1993-06-10 | PDF

Undated pamphlet discussing the background of the Turnkey Demonstration Program of the Federal Transit Administration. The program focusing on the design-build aspects of turnkey transit projects included industry outreach and received ten proposals.

08/10/2026

Title : Design/Build: A New Approach Corporate Creator(s) : United States. Department of Transportation. Federal Transit Administration Published Date : 1993-06-10 DOI : https://doi.org/10.21949/1530421
United States. Department of Transportation. Federal Transit Administration (1993). Design/Build: A New Approach. United States. Department of Transportation. Federal Transit Administration. https://doi.org/10.21949/1530421

United States. Department of Transportation. Federal Transit Administration. Design/Build: A New Approach. United States. Department of Transportation. Federal Transit Administration, 1993. https://doi.org/10.21949/1530421.

United States. Department of Transportation. Federal Transit Administration Design/Build: A New Approach. United States. Department of Transportation. Federal Transit Administration, 1993, ROSA P. https://doi.org/10.21949/1530421.
Export RIS Citation Information. TY - Booklet/Pamphlet A2 - United States. Department of Transportation. Federal Transit Administration AB - Undated pamphlet discussing the background of the Turnkey Demonstration Program of the Federal Transit Administration. The program focusing on the design-build aspects of turnkey transit projects included industry outreach and received ten proposals. AN - dot:92860 DA - 1993-06-10 DO - https://doi.org/10.21949/1530421 KW - Public transit KW - Transportation planning KW - Transit oriented development KW - Planning and design KW - Demonstration projects LA - English PB - United States. Department of Transportation. Federal Transit Administration PY - 1993 TI - Design/Build: A New Approach M3 - Booklet/Pamphlet N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92860 ER -
Bus Rapid Transit: Why More Communities are Choosing Bus Rapid Transit

National Academies of Sciences, Engineering, and Medicine (U.S.). Transportation Research Board ...

2001-01-01 | PDF

Pamphlet explaining the benefits and features of Bus Rapid Transit (BRT), a cost-effective and innovative form of public transportation.

08/10/2026

Title : Bus Rapid Transit: Why More Communities are Choosing Bus Rapid Transit Corporate Creator(s) : National Academies of Sciences, Engineering, and Medicine (U.S.). Transportation Research Board;United States. Department of Transportation. Federal Transit Administration; Published Date : 2001-01-01 DOI : https://doi.org/10.21949/1530420
National Academies of Sciences, Engineering, and Medicine (U.S.). Transportation Research Board, & United States. Department of Transportation. Federal Transit Administration (2001). Bus Rapid Transit: Why More Communities are Choosing Bus Rapid Transit. National Academies of Sciences, Engineering, and Medicine (U.S.). Transportation Research Board. https://doi.org/10.21949/1530420

National Academies of Sciences, Engineering, and Medicine (U.S.). Transportation Research Board and United States. Department of Transportation. Federal Transit Administration. Bus Rapid Transit: Why More Communities are Choosing Bus Rapid Transit. National Academies of Sciences, Engineering, and Medicine (U.S.). Transportation Research Board, 2001. https://doi.org/10.21949/1530420.

National Academies of Sciences, Engineering, and Medicine (U.S.). Transportation Research Board, et al. Bus Rapid Transit: Why More Communities are Choosing Bus Rapid Transit. National Academies of Sciences, Engineering, and Medicine (U.S.). Transportation Research Board, 2001, ROSA P. https://doi.org/10.21949/1530420.
Export RIS Citation Information. TY - Booklet/Pamphlet A2 - National Academies of Sciences, Engineering, and Medicine (U.S.). Transportation Research Board A2 - United States. Department of Transportation. Federal Transit Administration AB - Pamphlet explaining the benefits and features of Bus Rapid Transit (BRT), a cost-effective and innovative form of public transportation. AN - dot:92859 DA - 2001-01-01 DO - https://doi.org/10.21949/1530420 KW - Bus rapid transit KW - Public transit KW - Bus transit KW - Mobility KW - Buses KW - Express buses LA - English PB - National Academies of Sciences, Engineering, and Medicine (U.S.). Transportation Research Board PY - 2001 TI - Bus Rapid Transit: Why More Communities are Choosing Bus Rapid Transit M3 - Booklet/Pamphlet N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92859 ER -
Bicycles & Transit: A Partnership That Works

United States. Department of Transportation. Federal Transit Administration

1998-06-01 | PDF

Federal Transit Administration brochure showcasing how transit agencies around the United States are building connections between bicycles and transit.

08/10/2026

Title : Bicycles & Transit: A Partnership That Works Corporate Creator(s) : United States. Department of Transportation. Federal Transit Administration Contributor(s) : Linton, Gordon J. Published Date : 1998-06-01 DOI : https://doi.org/10.21949/1530419
United States. Department of Transportation. Federal Transit Administration (1998). Bicycles & Transit: A Partnership That Works. United States. Department of Transportation. Federal Transit Administration. https://doi.org/10.21949/1530419

United States. Department of Transportation. Federal Transit Administration. Bicycles & Transit: A Partnership That Works. United States. Department of Transportation. Federal Transit Administration, 1998. https://doi.org/10.21949/1530419.

United States. Department of Transportation. Federal Transit Administration Bicycles & Transit: A Partnership That Works. United States. Department of Transportation. Federal Transit Administration, 1998, ROSA P. https://doi.org/10.21949/1530419.
Export RIS Citation Information. TY - Booklet/Pamphlet A2 - United States. Department of Transportation. Federal Transit Administration AB - Federal Transit Administration brochure showcasing how transit agencies around the United States are building connections between bicycles and transit. AN - dot:92858 DA - 1998-06-01 DO - https://doi.org/10.21949/1530419 KW - Bicycles KW - Public transit KW - Multimodal transportation KW - Bike and ride KW - Transportation planning KW - Livability LA - English PB - United States. Department of Transportation. Federal Transit Administration PY - 1998 TI - Bicycles & Transit: A Partnership That Works M3 - Booklet/Pamphlet N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92858 ER -
Art in Transit...Making it Happen

United States. Department of Transportation. Federal Transit Administration

1996-02-01 | PDF

Photograph-filled book making the case for art-forward transit system design. Ten examples illustrate the ways in which transit agencies engaged artists, civic leaders, community residents, and businesses in changing the way transit vehicles and facilities are designed.

08/10/2026

Title : Art in Transit...Making it Happen Corporate Creator(s) : United States. Department of Transportation. Federal Transit Administration Corporate Contributor(s) : New York (State). Metropolitan Transportation Authority Contributor(s) : Feuer, Wendy;Kane, Belinda M.;Vandervort, Holly;Henry, Kendal;Hudson, Monica;Bressi, Todd W.;Hamblin, Peter;Linton, Gordon J.;Sadik-Khan, Janette; Published Date : 1996-02-01 DOI : https://doi.org/10.21949/1530418
United States. Department of Transportation. Federal Transit Administration (1996). Art in Transit...Making it Happen. United States. Department of Transportation. Federal Transit Administration. https://doi.org/10.21949/1530418

United States. Department of Transportation. Federal Transit Administration. Art in Transit...Making it Happen. United States. Department of Transportation. Federal Transit Administration, 1996. https://doi.org/10.21949/1530418.

United States. Department of Transportation. Federal Transit Administration Art in Transit...Making it Happen. United States. Department of Transportation. Federal Transit Administration, 1996, ROSA P. https://doi.org/10.21949/1530418.
Export RIS Citation Information. TY - Booklet/Pamphlet A2 - United States. Department of Transportation. Federal Transit Administration A3 - New York (State). Metropolitan Transportation Authority AB - Photograph-filled book making the case for art-forward transit system design. Ten examples illustrate the ways in which transit agencies engaged artists, civic leaders, community residents, and businesses in changing the way transit vehicles and facilities are designed. AN - dot:92857 DA - 1996-02-01 DO - https://doi.org/10.21949/1530418 KW - Public transit KW - Art KW - Design KW - Human factors engineering KW - Quality of life KW - Transportation planning LA - English PB - United States. Department of Transportation. Federal Transit Administration PY - 1996 TI - Art in Transit...Making it Happen M3 - Booklet/Pamphlet N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92857 ER -
Advanced Public Transportation Systems

United States. Department of Transportation. Federal Transit Administration

1993-01-01 | PDF

Undated booklet describing the Federal Transit Administration's Advanced Public Transportation System program as part of the United States Department of Transportation's initiative in Intelligent Vehicle Highway Systems.

08/10/2026

Title : Advanced Public Transportation Systems Corporate Creator(s) : United States. Department of Transportation. Federal Transit Administration Published Date : 1993-01-01 DOI : https://doi.org/10.21949/1530417
United States. Department of Transportation. Federal Transit Administration (1993). Advanced Public Transportation Systems. United States. Department of Transportation. Federal Transit Administration. https://doi.org/10.21949/1530417

United States. Department of Transportation. Federal Transit Administration. Advanced Public Transportation Systems. United States. Department of Transportation. Federal Transit Administration, 1993. https://doi.org/10.21949/1530417.

United States. Department of Transportation. Federal Transit Administration Advanced Public Transportation Systems. United States. Department of Transportation. Federal Transit Administration, 1993, ROSA P. https://doi.org/10.21949/1530417.
Export RIS Citation Information. TY - Booklet/Pamphlet A2 - United States. Department of Transportation. Federal Transit Administration AB - Undated booklet describing the Federal Transit Administration's Advanced Public Transportation System program as part of the United States Department of Transportation's initiative in Intelligent Vehicle Highway Systems. AN - dot:92856 DA - 1993-01-01 DO - https://doi.org/10.21949/1530417 KW - Intelligent transportation systems KW - Advanced public transportation systems KW - Mobility KW - Public transit LA - English PB - United States. Department of Transportation. Federal Transit Administration PY - 1993 TI - Advanced Public Transportation Systems M3 - Booklet/Pamphlet N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92856 ER -
Colorado Department of Transportation's Current Procedure for Life Cycle Cost Analysis and Discount Rate Calculations

Harris, Scott

2009-01-01 | PDF

This report provides information on life cycle cost analysis (LCCA) as applied to CDOT roadways. It describes the current method CDOT uses to select a discount rate. It also summarizes data collected from several states listing their HMA overlay cycles and discount rates. Implementation: The discount rate will be calculated annually by the HQ Mater ...

08/10/2026

Title : Colorado Department of Transportation's Current Procedure for Life Cycle Cost Analysis and Discount Rate Calculations Creator(s) : Harris, Scott Corporate Creator(s) : Colorado. Dept. of Transportation. Materials and Geotechnical Branch Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2009-01-01 Report Number : CDOT-2009-2 URL : https://rosap.ntl.bts.gov/view/dot/92855
Harris, S. (2009). Colorado Department of Transportation's Current Procedure for Life Cycle Cost Analysis and Discount Rate Calculations (Report No. CDOT-2009-2). Colorado Department of Transportation. Applied Research & Innovations Branch. https://rosap.ntl.bts.gov/view/dot/92855

Harris, Scott. Colorado Department of Transportation's Current Procedure for Life Cycle Cost Analysis and Discount Rate Calculations. Report no. CDOT-2009-2. Colorado Department of Transportation. Applied Research & Innovations Branch, 2009. https://rosap.ntl.bts.gov/view/dot/92855.

Harris, Scott Colorado Department of Transportation's Current Procedure for Life Cycle Cost Analysis and Discount Rate Calculations. Colorado Department of Transportation. Applied Research & Innovations Branch, 2009, Report no. CDOT-2009-2, ROSA P. https://rosap.ntl.bts.gov/view/dot/92855.
Export RIS Citation Information. TY - Tech Report AU - Harris, Scott A2 - Colorado. Dept. of Transportation. Materials and Geotechnical Branch A3 - United States. Department of Transportation. Federal Highway Administration AB - This report provides information on life cycle cost analysis (LCCA) as applied to CDOT roadways. It describes the current method CDOT uses to select a discount rate. It also summarizes data collected from several states listing their HMA overlay cycles and discount rates. Implementation: The discount rate will be calculated annually by the HQ Materials Pavement Design Unit and distributed to the Pavement Design Engineers in each Region for use in their LCCA. AN - dot:92855 DA - 2009-01-01 ET - Final Report KW - Life cycle analysis KW - Discount KW - Probability theory KW - Inflation KW - Procedures KW - Rates KW - State departments of transportation KW - Data collection KW - Pavement design KW - Hot mix asphalt KW - discount rate KW - probabilistic LCCA KW - deterministic LCCA KW - triangular distribution KW - normal distribution KW - lognormal distribution KW - rehabilitation cycles LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2009 SN - CDOT-2009-2 TI - Colorado Department of Transportation's Current Procedure for Life Cycle Cost Analysis and Discount Rate Calculations M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92855 ER -
Summary Report - Full-Scale Transport Controlled Impact Demonstration Program

United States. National Aeronautics and Space Administration

1987-09-01 | PDF

The Federal Aviation Administration (FAA) and National Aeronautics and Space Administration (NASA) conducted a full-scale air-to-surface impact-survivable 11impact demonstration11 with a remotely piloted transport aircraft on December 1, 1984, at Edwards Air Force Base. California. The test article consisted of experiments, special equipment, and s ...

08/10/2026

Title : Summary Report - Full-Scale Transport Controlled Impact Demonstration Program Corporate Creator(s) : United States. National Aeronautics and Space Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Standards Published Date : 1987-09-01 Report Number : DOT/FAA/CT-87/10 URL : https://rosap.ntl.bts.gov/view/dot/92854
United States. National Aeronautics and Space Administration (1987). Summary Report - Full-Scale Transport Controlled Impact Demonstration Program (Report No. DOT/FAA/CT-87/10). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/92854

United States. National Aeronautics and Space Administration. Summary Report - Full-Scale Transport Controlled Impact Demonstration Program. Report no. DOT/FAA/CT-87/10. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1987. https://rosap.ntl.bts.gov/view/dot/92854.

United States. National Aeronautics and Space Administration Summary Report - Full-Scale Transport Controlled Impact Demonstration Program. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1987, Report no. DOT/FAA/CT-87/10, ROSA P. https://rosap.ntl.bts.gov/view/dot/92854.
Export RIS Citation Information. TY - Tech Report A2 - United States. National Aeronautics and Space Administration A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Standards AB - The Federal Aviation Administration (FAA) and National Aeronautics and Space Administration (NASA) conducted a full-scale air-to-surface impact-survivable 11impact demonstration11 with a remotely piloted transport aircraft on December 1, 1984, at Edwards Air Force Base. California. The test article consisted of experiments, special equipment, and supporting systems. such as antimisting kerosene (AMK), crashworthiness structural/restraint analytical modeling, cabin fire safety, flight data recorders, post-impact investigation, instrumentation/data acquisition systems, remotely piloted vehicle/flight control systems, range and flight safety provisions, etc. AN - dot:92854 DA - 1987-09-01 ET - Final Report KW - Aircraft cabins KW - Airplanes KW - Crash tests KW - Fires KW - Fuels KW - Impacts KW - Crashworthiness LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1987 SN - DOT/FAA/CT-87/10 TI - Summary Report - Full-Scale Transport Controlled Impact Demonstration Program M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92854 ER -
Impact of Charging Infrastructure on Electric Vehicle Adoption: A Synthetic Population Approach

Cirillo, Cinzia

;

Burra, Lavan Teja

2026-03-01 | PDF

Currently there is limited availability of travel survey data on households with electric vehicles (EVs) and fine geographic data on factors influencing EV ownership levels. To address this gap, we propose an integrated approach utilizing a discrete choice model and a Bayesian network-generated synthetic population. Applied to Maryland, the model a ...

08/10/2026

Title : Impact of Charging Infrastructure on Electric Vehicle Adoption: A Synthetic Population Approach Creator(s) : Cirillo, Cinzia;Burra, Lavan Teja;Al-khasawneh, Mohammad Bilal Mohammad; Corporate Creator(s) : University of Maryland (College Park, Md.);Morgan State University.Safety and Mobility Advancement Regional Transportation and Economics Research Center (SMARTER) University Transportation Center (UTC); Corporate Contributor(s) : United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2026-03-01 Report Number : SM25 URL : https://rosap.ntl.bts.gov/view/dot/92853
Cirillo, C., Burra, L. T., & Al-khasawneh, M. B. M. (2026). Impact of Charging Infrastructure on Electric Vehicle Adoption: A Synthetic Population Approach (Report No. SM25). Morgan State University.Safety and Mobility Advancement Regional Transportation and Economics Research Center (SMARTER) University Transportation Center (UTC). https://rosap.ntl.bts.gov/view/dot/92853

Cirillo, Cinzia, Lavan Teja Burra, and Mohammad Bilal Mohammad Al-khasawneh. Impact of Charging Infrastructure on Electric Vehicle Adoption: A Synthetic Population Approach. Report no. SM25. Morgan State University.Safety and Mobility Advancement Regional Transportation and Economics Research Center (SMARTER) University Transportation Center (UTC), 2026. https://rosap.ntl.bts.gov/view/dot/92853.

Cirillo, Cinzia, et al. Impact of Charging Infrastructure on Electric Vehicle Adoption: A Synthetic Population Approach. Morgan State University.Safety and Mobility Advancement Regional Transportation and Economics Research Center (SMARTER) University Transportation Center (UTC), 2026, Report no. SM25, ROSA P. https://rosap.ntl.bts.gov/view/dot/92853.
Export RIS Citation Information. TY - Tech Report AU - Cirillo, Cinzia AU - Burra, Lavan Teja AU - Al-khasawneh, Mohammad Bilal Mohammad A2 - University of Maryland (College Park, Md.) A2 - Morgan State University.Safety and Mobility Advancement Regional Transportation and Economics Research Center (SMARTER) University Transportation Center (UTC) A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - Currently there is limited availability of travel survey data on households with electric vehicles (EVs) and fine geographic data on factors influencing EV ownership levels. To address this gap, we propose an integrated approach utilizing a discrete choice model and a Bayesian network-generated synthetic population. Applied to Maryland, the model analyzes the impact of public charging stations (level-2 and DC fast chargers) on EV ownership at the census tract level. Access to fast charging, workplace charging, and the possibility of teleworking are key factors influencing EV ownership. The model, applied to the synthetic population, predicts higher EV growth in suburban regions compared to urban areas. This demonstrates the application of this methodology in understanding micro-level EV adoption rates for informing targeted policies and infrastructure development. AN - dot:92853 DA - 2026-03-01 ET - Final Report KW - Electric vehicles KW - Electric vehicle charging KW - Infrastructure KW - Surveys KW - Data collection KW - Urban areas KW - Charging infrastructure KW - Synthetic population KW - DC fast charging LA - English PB - Morgan State University.Safety and Mobility Advancement Regional Transportation and Economics Research Center (SMARTER) University Transportation Center (UTC) PY - 2026 SN - SM25 TI - Impact of Charging Infrastructure on Electric Vehicle Adoption: A Synthetic Population Approach M3 - Tech Report N1 - United States N1 - 69A3552348303 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92853 ER -
Analysis of Using Reclaimed Asphalt Pavement (RAP) as a Base Course Material

Locander, Rober

2009-02-01 | PDF

The Colorado Department of Transportation (CDOT) has used Reclaimed Asphalt Pavement (RAP) as a base on many projects as a reconstruction strategy. CDOT's specifications allow RAP to be substituted for unbound aggregate base course (ABC). The laboratory tested properties of reclaimed asphalt pavement are similar to CDOT's aggregate base course spec ...

08/10/2026

Title : Analysis of Using Reclaimed Asphalt Pavement (RAP) as a Base Course Material Creator(s) : Locander, Rober Corporate Creator(s) : Colorado Department of Transportation. Office of Applied Research Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2009-02-01 Report Number : CDOT-2009-5 URL : https://rosap.ntl.bts.gov/view/dot/92852
Locander, R. (2009). Analysis of Using Reclaimed Asphalt Pavement (RAP) as a Base Course Material (Report No. CDOT-2009-5). Colorado Department of Transportation. Applied Research & Innovations Branch. https://rosap.ntl.bts.gov/view/dot/92852

Locander, Rober. Analysis of Using Reclaimed Asphalt Pavement (RAP) as a Base Course Material. Report no. CDOT-2009-5. Colorado Department of Transportation. Applied Research & Innovations Branch, 2009. https://rosap.ntl.bts.gov/view/dot/92852.

Locander, Rober Analysis of Using Reclaimed Asphalt Pavement (RAP) as a Base Course Material. Colorado Department of Transportation. Applied Research & Innovations Branch, 2009, Report no. CDOT-2009-5, ROSA P. https://rosap.ntl.bts.gov/view/dot/92852.
Export RIS Citation Information. TY - Tech Report AU - Locander, Rober A2 - Colorado Department of Transportation. Office of Applied Research A3 - United States. Department of Transportation. Federal Highway Administration AB - The Colorado Department of Transportation (CDOT) has used Reclaimed Asphalt Pavement (RAP) as a base on many projects as a reconstruction strategy. CDOT's specifications allow RAP to be substituted for unbound aggregate base course (ABC). The laboratory tested properties of reclaimed asphalt pavement are similar to CDOT's aggregate base course specifications. Conclusions are: RAP has pavement design properties similar to aggregate base course; a suggested gradation specification band is presented for RAP; RAP requirements for PI and LL may be the same as ABC Class 6, PI not to exceed six and LL not greater than 30; the stiffness strength properties obtained from laboratory testing shows that RAP has stiffness strength above an unbound ABC Class 6 ; and the permeability of RAP showed a slight increase over an unbound ABC Class 6. AN - dot:92852 DA - 2009-02-01 KW - Aggregates KW - Pavement base course KW - Stiffness KW - Strength of materials KW - Permeability KW - Laboratory tests LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2009 SN - CDOT-2009-5 TI - Analysis of Using Reclaimed Asphalt Pavement (RAP) as a Base Course Material M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92852 ER -
Tire/Pavement and Environmental Traffic Noise Research Study Interim Report - 2006 Testing

Rasmussen, Robert Otto

2008-07-01 | PDF

This research study on tire-pavement noise is being conducted in response to CDOT's interest in traffic noise in general, and the tire/pavement interaction in particular. Following a rigid set of testing protocols, data is being collected on highway traffic noise characteristics along with safety and durability aspects of the associated pavements. ...

08/10/2026

Title : Tire/Pavement and Environmental Traffic Noise Research Study Interim Report - 2006 Testing Creator(s) : Rasmussen, Robert Otto Corporate Creator(s) : The Transtec Group, Inc. Corporate Contributor(s) : Colorado Department of Transportation. Office of Applied Research;United States. Department of Transportation. Federal Highway Administration; Published Date : 2008-07-01 Report Number : CDOT- 2008-2 URL : https://rosap.ntl.bts.gov/view/dot/92851
Rasmussen, R. O. (2008). Tire/Pavement and Environmental Traffic Noise Research Study Interim Report - 2006 Testing (Report No. CDOT- 2008-2). Colorado Department of Transportation. Applied Research & Innovations Branch. https://rosap.ntl.bts.gov/view/dot/92851

Rasmussen, Robert Otto. Tire/Pavement and Environmental Traffic Noise Research Study Interim Report - 2006 Testing. Report no. CDOT- 2008-2. Colorado Department of Transportation. Applied Research & Innovations Branch, 2008. https://rosap.ntl.bts.gov/view/dot/92851.

Rasmussen, Robert Otto Tire/Pavement and Environmental Traffic Noise Research Study Interim Report - 2006 Testing. Colorado Department of Transportation. Applied Research & Innovations Branch, 2008, Report no. CDOT- 2008-2, ROSA P. https://rosap.ntl.bts.gov/view/dot/92851.
Export RIS Citation Information. TY - Tech Report AU - Rasmussen, Robert Otto A2 - The Transtec Group, Inc. A3 - Colorado Department of Transportation. Office of Applied Research A3 - United States. Department of Transportation. Federal Highway Administration AB - This research study on tire-pavement noise is being conducted in response to CDOT's interest in traffic noise in general, and the tire/pavement interaction in particular. Following a rigid set of testing protocols, data is being collected on highway traffic noise characteristics along with safety and durability aspects of the associated pavements. The overall goal of this research project is to develop and execute a comprehensive, long-term study to determine if a particular pavement surface type and/or texture can be successfully used in Colorado to help satisfy FHWA noise mitigation requirements. The study is needed to accomplish the following: Determine the noise generation/reduction characteristics of pavements as functions of pavement type, pavement texture, age, time, traffic loading, and distance away from the pavement; Determine a correlation between source measurements including close-proximity (CPX) and on-board sound intensity(OBSI), and statistical pass-by (SPB) and time-averaged wayside measurements; and Accumulate information that can be used for validation and verification of the accuracy of the FHWA Traffic Noise Model(TNM) to use on future Colorado highway projects. AN - dot:92851 DA - 2008-07-01 ET - Interim Report - 2006 Testing KW - Traffic noise KW - Tire/pavement noise KW - Traffic mitigation KW - Testing KW - Implementation KW - Data collection KW - Climate KW - Evaluation KW - highway noise measurement KW - close-proximity method (CPX) KW - on-board sound intensity (OBSI) KW - statistical pass-by index (SPBI) KW - wayside measurement KW - Traffic Noise Model (TNM) LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2008 SN - CDOT- 2008-2 TI - Tire/Pavement and Environmental Traffic Noise Research Study Interim Report - 2006 Testing M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92851 ER -
Preventing Transverse Bumps and Cracks in New Asphalt Overlays Over Crack Sealants

Shuler, Scott

2017-01-01 | PDF

Crack sealants are often utilized as a preservation tool in asphalt pavements. These sealants are placed in cracks to prevent water intrusion into the pavement foundation. By reducing water intrusion, the strength of foundation layers is maintained and acceptable pavement performance is extended. However, when a hot mix asphalt overlay is placed on ...

08/10/2026

Title : Preventing Transverse Bumps and Cracks in New Asphalt Overlays Over Crack Sealants Creator(s) : Shuler, Scott Corporate Creator(s) : Colorado State University Corporate Contributor(s) : Colorado Department of Transportation. Office of Applied Research;United States. Department of Transportation. Federal Highway Administration; Published Date : 2017-01-01 Report Number : CDOT-2016-04;CDOT-2017-02; URL : https://rosap.ntl.bts.gov/view/dot/92850
Shuler, S. (2017). Preventing Transverse Bumps and Cracks in New Asphalt Overlays Over Crack Sealants (Report No. CDOT-2016-04). Colorado Department of Transportation. Applied Research & Innovations Branch. https://rosap.ntl.bts.gov/view/dot/92850

Shuler, Scott. Preventing Transverse Bumps and Cracks in New Asphalt Overlays Over Crack Sealants. Report no. CDOT-2016-04. Colorado Department of Transportation. Applied Research & Innovations Branch, 2017. https://rosap.ntl.bts.gov/view/dot/92850.

Shuler, Scott Preventing Transverse Bumps and Cracks in New Asphalt Overlays Over Crack Sealants. Colorado Department of Transportation. Applied Research & Innovations Branch, 2017, Report no. CDOT-2016-04, ROSA P. https://rosap.ntl.bts.gov/view/dot/92850.
Export RIS Citation Information. TY - Tech Report AU - Shuler, Scott A2 - Colorado State University A3 - Colorado Department of Transportation. Office of Applied Research A3 - United States. Department of Transportation. Federal Highway Administration AB - Crack sealants are often utilized as a preservation tool in asphalt pavements. These sealants are placed in cracks to prevent water intrusion into the pavement foundation. By reducing water intrusion, the strength of foundation layers is maintained and acceptable pavement performance is extended. However, when a hot mix asphalt overlay is placed on top a pavement containing crack sealants, a bump and additional transverse cracks sometimes occur in the new asphalt overlay. These bumps and sometimes, transverse cracks are initiated during breakdown rolling and become progressively more severe upon further compaction. This paper presents results of a five-year study designed to identify factors that relate to the appearance of these bumps and consequent cracks. Results of the study indicate that vibratory breakdown rolling, pavement gradient, sealant geometry, tack coat application rate and tack coat adhesivity are factors that contribute most to the occurrence of bumps and transverse cracks during asphalt overlay construction over crack sealants. Observations suggest that transverse bumps and consequent cracks occur in proportion to the size of the 'bow wave' of asphalt concrete present immediately in front of the breakdown roller. The increase in the 'bow wave' size is dependent on asphalt mixture properties, breakdown roller size, speed, vibration characteristics and pavement gradient. Four pavement test sections also indicate that tack coat application rate and adhesive properties also have an effect on reducing the appearance of transverse bumps. AN - dot:92850 DA - 2017-01-01 ET - Final Report KW - Full-depth reclamation KW - Asphalt emulsions KW - Asphalt pavements KW - Reconstruction KW - Cracking KW - Sealing compounds KW - Foundation engineering KW - Pavement performance LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2017 SN - CDOT-2016-04 TI - Preventing Transverse Bumps and Cracks in New Asphalt Overlays Over Crack Sealants M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92850 ER -
Fire Emergency Preparedness at the Eisenhower-Johnson Memorial Tunnels, CO

McDaniel, Kirk ;

Enright, Chris

2017-05-01 | PDF

The Department of Mining Engineering at the Colorado School of Mines (CSM) has been charged by the Colorado Department of Transportation (CDOT) to evaluate fire life safety at the Eisenhower-Johnson Memorial Tunnels (EJMT),particularly with the recent completion of a fixed fire suppression system (FFSS) for the tunnel interior. Over the past year, ...

08/10/2026

Title : Fire Emergency Preparedness at the Eisenhower-Johnson Memorial Tunnels, CO Creator(s) : McDaniel, Kirk;Enright, Chris;Brune, Jürgen;Zurhorst, Max;Gilmore, Richard;Ostoyich, Ryan; Corporate Creator(s) : Colorado School of Mines Corporate Contributor(s) : Colorado Department of Transportation. Office of Applied Research;United States. Department of Transportation. Federal Highway Administration; Published Date : 2017-05-01 Report Number : CDOT-2017-06 URL : https://rosap.ntl.bts.gov/view/dot/92849
McDaniel, K., Enright, C., Brune, J., Zurhorst, M., Gilmore, R., & Ostoyich, R. (2017). Fire Emergency Preparedness at the Eisenhower-Johnson Memorial Tunnels, CO (Report No. CDOT-2017-06). Colorado Department of Transportation. Applied Research & Innovations Branch. https://rosap.ntl.bts.gov/view/dot/92849

McDaniel, Kirk, Chris Enright, Jürgen Brune, Max Zurhorst, Richard Gilmore, and Ryan Ostoyich. Fire Emergency Preparedness at the Eisenhower-Johnson Memorial Tunnels, CO. Report no. CDOT-2017-06. Colorado Department of Transportation. Applied Research & Innovations Branch, 2017. https://rosap.ntl.bts.gov/view/dot/92849.

McDaniel, Kirk, et al. Fire Emergency Preparedness at the Eisenhower-Johnson Memorial Tunnels, CO. Colorado Department of Transportation. Applied Research & Innovations Branch, 2017, Report no. CDOT-2017-06, ROSA P. https://rosap.ntl.bts.gov/view/dot/92849.
Export RIS Citation Information. TY - Tech Report AU - McDaniel, Kirk AU - Enright, Chris AU - Brune, Jürgen AU - Zurhorst, Max AU - Gilmore, Richard AU - Ostoyich, Ryan A2 - Colorado School of Mines A3 - Colorado Department of Transportation. Office of Applied Research A3 - United States. Department of Transportation. Federal Highway Administration AB - The Department of Mining Engineering at the Colorado School of Mines (CSM) has been charged by the Colorado Department of Transportation (CDOT) to evaluate fire life safety at the Eisenhower-Johnson Memorial Tunnels (EJMT),particularly with the recent completion of a fixed fire suppression system (FFSS) for the tunnel interior. Over the past year, a research team at CSM conducted a detailed examination of the policies, methods and infrastructure related to response to fire emergencies at the tunnel complex. Researchers utilized a risk assessment model and computational fluid dynamics(CFD) modeling for fire dynamics simulation. With this detailed evaluation process, researchers developed a series of recommendations and conclusions for facility and process improvements at the EJMT. AN - dot:92849 DA - 2017-05-01 ET - Final Report KW - Vehicular tunnels KW - Fire prevention KW - Fluid dynamics KW - Emergency management KW - Risk management KW - Hazard analysis KW - fire life safety KW - fire scenarios KW - fire suppression system KW - Fire Dynamic Simulator KW - emergency response KW - hazard evaluation LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2017 SN - CDOT-2017-06 TI - Fire Emergency Preparedness at the Eisenhower-Johnson Memorial Tunnels, CO M3 - Tech Report N1 - United States N1 - 316.01 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92849 ER -
Automated Placement and Retrieval of Traffic Cones

Theiss, LuAnn ;

Ullman, Gerald L.

2017-07-01 | PDF

This research report documents the findings of an investigation into automated temporary traffic control device (TTCD) deployment and retrieval technologies. The researchers used a literature review to gather product relevant product information from manufacturers and vendors. The survey of transportation agency contacts was used to identify automa ...

08/10/2026

Title : Automated Placement and Retrieval of Traffic Cones Creator(s) : Theiss, LuAnn;Ullman, Gerald L.; Corporate Creator(s) : Texas A&M Transportation Institute Corporate Contributor(s) : Colorado Department of Transportation. Office of Applied Research;United States. Department of Transportation. Federal Highway Administration; Published Date : 2017-07-01 Report Number : CDOT-2017-07 URL : https://rosap.ntl.bts.gov/view/dot/92848
Theiss, L., & Ullman, G. L. (2017). Automated Placement and Retrieval of Traffic Cones (Report No. CDOT-2017-07). Colorado Department of Transportation. Applied Research & Innovations Branch. https://rosap.ntl.bts.gov/view/dot/92848

Theiss, LuAnn and Gerald L. Ullman. Automated Placement and Retrieval of Traffic Cones. Report no. CDOT-2017-07. Colorado Department of Transportation. Applied Research & Innovations Branch, 2017. https://rosap.ntl.bts.gov/view/dot/92848.

Theiss, LuAnn, and Gerald L. Ullman Automated Placement and Retrieval of Traffic Cones. Colorado Department of Transportation. Applied Research & Innovations Branch, 2017, Report no. CDOT-2017-07, ROSA P. https://rosap.ntl.bts.gov/view/dot/92848.
Export RIS Citation Information. TY - Tech Report AU - Theiss, LuAnn AU - Ullman, Gerald L. A2 - Texas A&M Transportation Institute A3 - Colorado Department of Transportation. Office of Applied Research A3 - United States. Department of Transportation. Federal Highway Administration AB - This research report documents the findings of an investigation into automated temporary traffic control device (TTCD) deployment and retrieval technologies. The researchers used a literature review to gather product relevant product information from manufacturers and vendors. The survey of transportation agency contacts was used to identify automated TTCD deployment and retrieval technologies and agency experiences. The researchers found that some automated TTCD deployment and retrieval products may reduce one or more types of worker risk while increasing other types of risk. A fully automated product has the potential for the greatest risk reduction overall, but also has a much higher cost than less complex systems. Partially automated systems may reduce opportunities for worker injury due to TTCD lifting and lowering mechanisms, but they may also introduce increased opportunities for workers to fall from their platforms. Systems with no automation offer the least benefit, but also have lower costs. Implementation: Steps to implementation include:(1) CDOT will need to determine which TTCD setup and removal systems best fit into their risk-balancing practices by reviewing the types of injuries that CDOT maintenance forces have experienced and comparing them to the types of injuries that each TTCD setup and removal system can reduce or eliminate.(2) If CDOT is interested in a fully-automated system, consideration should be given to performing a peer exchange with the Minnesota DOT, which has recently procured and is now using such a device. CDOT should contact their Federal Highway Administration (FHWA) Division to explore the funding potential for such a peer exchange. AN - dot:92848 DA - 2017-07-01 ET - Final Report KW - Work zones KW - Occupational safety KW - Traffic control KW - Traffic cones KW - Drum containers KW - Vertical supports KW - Automation KW - Literature reviews KW - Surveys KW - temporary traffic control KW - maintenance of traffic KW - channelizing devices LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2017 SN - CDOT-2017-07 TI - Automated Placement and Retrieval of Traffic Cones M3 - Tech Report N1 - United States N1 - CDOT 314.04 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92848 ER -
Hybrid A-Frame Micropile-Geosythetic Reinforced Wall With Impact Barrier: Design Development and Construction Approach

Pak, Ronald Y. S. ;

Zhang, Zhichao

2018-05-15 | PDF

This report presents the results of a comprehensive evaluation of a hybrid A-frame micropiles-geosynthetic reinforced soil wall design to support roadways with TL-4 impact road barriers on mountainous roads and its accompanying engineering options in dealing with the foundation stability problems in road widening and construction projects. Extensiv ...

08/10/2026

Title : Hybrid A-Frame Micropile-Geosythetic Reinforced Wall With Impact Barrier: Design Development and Construction Approach Creator(s) : Pak, Ronald Y. S.;Zhang, Zhichao; Corporate Creator(s) : University of Colorado Boulder Corporate Contributor(s) : Colorado Department of Transportation. Office of Applied Research;United States. Department of Transportation. Federal Highway Administration; Published Date : 2018-05-15 Report Number : CDOT-2018-11 URL : https://rosap.ntl.bts.gov/view/dot/92847
Pak, R. Y. S., & Zhang, Z. (2018). Hybrid A-Frame Micropile-Geosythetic Reinforced Wall With Impact Barrier: Design Development and Construction Approach (Report No. CDOT-2018-11). Colorado Department of Transportation. Applied Research & Innovations Branch. https://rosap.ntl.bts.gov/view/dot/92847

Pak, Ronald Y. S. and Zhichao Zhang. Hybrid A-Frame Micropile-Geosythetic Reinforced Wall With Impact Barrier: Design Development and Construction Approach. Report no. CDOT-2018-11. Colorado Department of Transportation. Applied Research & Innovations Branch, 2018. https://rosap.ntl.bts.gov/view/dot/92847.

Pak, Ronald Y. S., and Zhichao Zhang Hybrid A-Frame Micropile-Geosythetic Reinforced Wall With Impact Barrier: Design Development and Construction Approach. Colorado Department of Transportation. Applied Research & Innovations Branch, 2018, Report no. CDOT-2018-11, ROSA P. https://rosap.ntl.bts.gov/view/dot/92847.
Export RIS Citation Information. TY - Tech Report AU - Pak, Ronald Y. S. AU - Zhang, Zhichao A2 - University of Colorado Boulder A3 - Colorado Department of Transportation. Office of Applied Research A3 - United States. Department of Transportation. Federal Highway Administration AB - This report presents the results of a comprehensive evaluation of a hybrid A-frame micropiles-geosynthetic reinforced soil wall design to support roadways with TL-4 impact road barriers on mountainous roads and its accompanying engineering options in dealing with the foundation stability problems in road widening and construction projects. Extensive numerical simulations of MSE walls were conducted by 3D nonlinear computer modeling using an advanced finite element code and an elastoplastic soil model that has been well calibrated in past NCHRP and CDOT projects. Collaborated partially by an experimental scaled model study that substantiated the general applicability of the modeling platform, the performance of the hybrid design under self-weight, surcharge and dynamic impacts was investigated in detail and compared with that of a truncated GRS wall with regular construction. The available option of using the A-frame micropile as an integrated solution to the related local slope-foundation stability problem that can be triggered by the wall construction was explored and quantified by the large-deformation analysis with the aid of the new threshold effective strain concept whose validity was demonstrated against ordinary limit-equilibrium slope stability methods in benchmark settings. While there remains engineering details to be explored and more realistic representation of material components to be incorporated, the study has shown that the hybrid wall design offers potential as a new or remedial engineering option in coping with difficult hillside or steep terrain conditions for road expansion or new projects. Implementation: The design worksheets should be further evaluated and checked for field construction, monitoring and adaptations. More refined and detailed modeling of the hybrid design's material components beyond the soil and geofabric and the performance of the system at new MASH loads is also strongly recommended. AN - dot:92847 DA - 2018-05-15 ET - Final Report KW - Geosynthetics KW - Soils KW - Mechanically stabilized earth KW - Traffic barriers KW - Slope stability KW - Safety factors KW - Finite element method KW - Deformation KW - geosynthetic reinforced soil (GRS) KW - micropiles KW - impact road barriers KW - large deformation KW - LS-DYNA LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2018 SN - CDOT-2018-11 TI - Hybrid A-Frame Micropile-Geosythetic Reinforced Wall With Impact Barrier: Design Development and Construction Approach M3 - Tech Report N1 - United States N1 - 214.03 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92847 ER -
Development of Cost-Effective Ultra-High Performance Concrete (UHPC) for Colorado's Sustainable Infrastructure

Kim, Yail Jimmy

2018-05-18 | PDF

This report presents the development of ultra-high performance concrete (UHPC) using locally available materials that reduce construction costs compared with commercial products. With the aim of achieving a specified compressive strength of 20 ksi, a UHPC mixture is formulated. The implications of various constituent types are examined with an emph ...

08/10/2026

Title : Development of Cost-Effective Ultra-High Performance Concrete (UHPC) for Colorado's Sustainable Infrastructure Creator(s) : Kim, Yail Jimmy Corporate Creator(s) : University of Colorado at Denver Corporate Contributor(s) : Colorado Department of Transportation. Office of Applied Research;United States. Department of Transportation. Federal Highway Administration; Published Date : 2018-05-18 Report Number : CDOT-2018-15 URL : https://rosap.ntl.bts.gov/view/dot/92846
Kim, Y. J. (2018). Development of Cost-Effective Ultra-High Performance Concrete (UHPC) for Colorado's Sustainable Infrastructure (Report No. CDOT-2018-15). Colorado Department of Transportation. Applied Research & Innovations Branch. https://rosap.ntl.bts.gov/view/dot/92846

Kim, Yail Jimmy. Development of Cost-Effective Ultra-High Performance Concrete (UHPC) for Colorado's Sustainable Infrastructure. Report no. CDOT-2018-15. Colorado Department of Transportation. Applied Research & Innovations Branch, 2018. https://rosap.ntl.bts.gov/view/dot/92846.

Kim, Yail Jimmy Development of Cost-Effective Ultra-High Performance Concrete (UHPC) for Colorado's Sustainable Infrastructure. Colorado Department of Transportation. Applied Research & Innovations Branch, 2018, Report no. CDOT-2018-15, ROSA P. https://rosap.ntl.bts.gov/view/dot/92846.
Export RIS Citation Information. TY - Tech Report AU - Kim, Yail Jimmy A2 - University of Colorado at Denver A3 - Colorado Department of Transportation. Office of Applied Research A3 - United States. Department of Transportation. Federal Highway Administration AB - This report presents the development of ultra-high performance concrete (UHPC) using locally available materials that reduce construction costs compared with commercial products. With the aim of achieving a specified compressive strength of 20 ksi, a UHPC mixture is formulated. The implications of various constituent types are examined with an emphasis on silica compounds (silica fume, silica powder, silica sand, finer silica sand, pyrogenic silica, and precipitated silica), including steel and polypropylene fibers. Bond tests are conducted to evaluate the development length of the UHPC. Cost analysis shows that the prototype UHPC is up to 74% less expensive than commercial products. Implementation: A step-by-step procedure is recommended in tandem with quality assurance and quality control for CDOT to implement the UHPC technology in bridge construction. AN - dot:92846 DA - 2018-05-18 ET - Final Report KW - Cost effectiveness KW - Development KW - Recommendations KW - Silica KW - Ultra high performance concrete KW - Sustainable development KW - Infrastructure KW - Quality control KW - Bridge construction KW - practice recommendations LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2018 SN - CDOT-2018-15 TI - Development of Cost-Effective Ultra-High Performance Concrete (UHPC) for Colorado's Sustainable Infrastructure M3 - Tech Report N1 - United States N1 - 215-04 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92846 ER -
Transportation Impacts of Berkeley Hills Tunnel Disruption by Earthquakes

Han, Tianyu

;

Zhao, Bingyu

2026-08-01 | PDF

In the San Francisco Bay Area, earthquake damage to a small number of critical transportation facilities can produce regionwide mobility impacts. This report evaluates the Berkeley Hills Tunnel, a key Bay Area Rapid Transit (BART) cross-hills connection, using an integrated model that links tunnel seismic performance to transportation consequences ...

08/10/2026

Title : Transportation Impacts of Berkeley Hills Tunnel Disruption by Earthquakes Creator(s) : Han, Tianyu;Zhao, Bingyu;Tang, Yili (Kelly);Comfort, Louise;Soga, Kenichi; Corporate Creator(s) : Technische Universität Wien;University of Western Ontario;University of Pittsburgh;University of California, Berkeley; Corporate Contributor(s) : University of California Institute of Transportation Studies Published Date : 2026-08-01 Report Number : UC-ITS-2024-14 DOI : https://doi.org/10.7922/G2J964SM
Han, T., Zhao, B., Tang, Y. (., Comfort, L., & Soga, K. (2026). Transportation Impacts of Berkeley Hills Tunnel Disruption by Earthquakes (Report No. UC-ITS-2024-14). University of California, Berkeley. Institute of Transportation Studies. https://doi.org/10.7922/G2J964SM

Han, Tianyu, Bingyu Zhao, Yili (Kelly) Tang, Louise Comfort, and Kenichi Soga. Transportation Impacts of Berkeley Hills Tunnel Disruption by Earthquakes. Report no. UC-ITS-2024-14. University of California, Berkeley. Institute of Transportation Studies, 2026. https://doi.org/10.7922/G2J964SM.

Han, Tianyu, et al. Transportation Impacts of Berkeley Hills Tunnel Disruption by Earthquakes. University of California, Berkeley. Institute of Transportation Studies, 2026, Report no. UC-ITS-2024-14, ROSA P. https://doi.org/10.7922/G2J964SM.
Export RIS Citation Information. TY - Tech Report AU - Han, Tianyu AU - Zhao, Bingyu AU - Tang, Yili (Kelly) AU - Comfort, Louise AU - Soga, Kenichi A2 - Technische Universität Wien A2 - University of Western Ontario A2 - University of Pittsburgh A2 - University of California, Berkeley A3 - University of California Institute of Transportation Studies AB - In the San Francisco Bay Area, earthquake damage to a small number of critical transportation facilities can produce regionwide mobility impacts. This report evaluates the Berkeley Hills Tunnel, a key Bay Area Rapid Transit (BART) cross-hills connection, using an integrated model that links tunnel seismic performance to transportation consequences during disruption and recovery. The model couples scenario-based seismic assessment of the tunnel with screening-level fragility for substitute corridors and propagates the resulting time-dependent capacity states through a transportation simulation. At a representative recovery-stage demand of 25 percent of normal, mean cross-hills travel time rises from about 9 minutes in the mildest scenario (327-year return period) to about 41 minutes in the most severe (654-year). In that severe case, a fully subscribed bus bridge can lower the mean cross-hills travel time by up to 30 percent. Uncertainty quantification identifies recovery-stage demand as the dominant source of travel-time variance and shows that unfavorable capacity combinations can nearly double travel time relative to the central estimate. Disruption falls disproportionately on transit-dependent travelers, who either endure longer travel times or pay an extra travel fee. Agencies can use the workflow to assess disruption impacts and identify likely bottlenecks, compare recovery-stage operational strategies, and target equitable service for affected populations. AN - dot:92845 DA - 2026-08-01 DO - https://doi.org/10.7922/G2J964SM ET - Final Report (December 2023 - December 2025) KW - Earthquakes KW - Earthquake engineering KW - Tunnels KW - Hills KW - Rail transit KW - Highways KW - Disaster resilience KW - Service disruption KW - Computer models LA - English PB - University of California, Berkeley. Institute of Transportation Studies PY - 2026 SN - UC-ITS-2024-14 TI - Transportation Impacts of Berkeley Hills Tunnel Disruption by Earthquakes M3 - Tech Report N1 - United States N1 - UC-ITS-2024-14 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92845 ER -
Runway Incursion Mitigation Fiscal Year 2025 Annual Summary Report

Healey, Joseph ;

Debban, Steven

2026-08-01 | PDF

In fiscal year (FY) 2012, the Federal Aviation Administration (FAA) Office of Airports (ARP) initiated a research study to identify and geographically locate areas at airports with nonstandard taxiway geometry. This research was advanced because an earlier study had shown nonstandard taxiway geometries to be associated with a higher prevalence of r ...

08/10/2026

Title : Runway Incursion Mitigation Fiscal Year 2025 Annual Summary Report Creator(s) : Healey, Joseph;Debban, Steven;Green, Leonard;Mize, Thomas;Sulsona, John;Liu, Candace;Thompson, Kent; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Aviation Research Division;AECOM;Applied Research Associates, Inc.; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Airport Engineering Division Published Date : 2026-08-01 Report Number : DOT/FAA/TC-26/27 DOI : https://doi.org/10.21949/0ftb-v738
Healey, J., Debban, S., Green, L., Mize, T., Sulsona, J., Liu, C., & Thompson, K. (2026). Runway Incursion Mitigation Fiscal Year 2025 Annual Summary Report (Report No. DOT/FAA/TC-26/27). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://doi.org/10.21949/0ftb-v738

Healey, Joseph, Steven Debban, Leonard Green, Thomas Mize, John Sulsona, Candace Liu, and Kent Thompson. Runway Incursion Mitigation Fiscal Year 2025 Annual Summary Report. Report no. DOT/FAA/TC-26/27. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 2026. https://doi.org/10.21949/0ftb-v738.

Healey, Joseph, et al. Runway Incursion Mitigation Fiscal Year 2025 Annual Summary Report. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 2026, Report no. DOT/FAA/TC-26/27, ROSA P. https://doi.org/10.21949/0ftb-v738.
Export RIS Citation Information. TY - Tech Report AU - Healey, Joseph AU - Debban, Steven AU - Green, Leonard AU - Mize, Thomas AU - Sulsona, John AU - Liu, Candace AU - Thompson, Kent A2 - United States. Department of Transportation. Federal Aviation Administration. Aviation Research Division A2 - AECOM A2 - Applied Research Associates, Inc. A3 - United States. Department of Transportation. Federal Aviation Administration. Airport Engineering Division AB - In fiscal year (FY) 2012, the Federal Aviation Administration (FAA) Office of Airports (ARP) initiated a research study to identify and geographically locate areas at airports with nonstandard taxiway geometry. This research was advanced because an earlier study had shown nonstandard taxiway geometries to be associated with a higher prevalence of runway incursions. The FAA defines a runway incursion (RI) as "any occurrence at an aerodrome involving the incorrect presence of an aircraft, vehicle, or person on the protected area of a surface designated for the landing and takeoff of aircraft." These occurrences include wrong runway landings and takeoffs. This research effort developed a geographic information system (GIS) database of approximately 520 airports with civilian air traffic control towers. For each airport, the location of nonstandard geometries, RIs, airfield hot spot areas, airport diagrams, and other airport-related information is identified. This research study identified 140 airfield locations with a high incidence of RIs using data from October 1, 2007, to September 30, 2013. As a result, a long-term improvement program, known as the Runway Incursion Mitigation (RIM) program, launched in FY2015. The goal of the program was to mitigate airfield locations with high incidents of RIs. A subset of the 140 locations identified was then validated for inclusion in the RIM program and prioritized for mitigation. AN - dot:92844 DA - 2026-08-01 DO - https://doi.org/10.21949/0ftb-v738 ET - Final Report KW - Runway incursions KW - Air transportation crashes KW - Airport planning KW - Plane geometry KW - Taxiways KW - Airport runways LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2026 SN - DOT/FAA/TC-26/27 TI - Runway Incursion Mitigation Fiscal Year 2025 Annual Summary Report M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92844 ER -
Short Line Safety Institute: 2025 Systematic Review [Research Results]

Kidda, Starr ;

Leone, Julia

2026-07-01 | PDF

SLSI conducts an annual analysis to assess the status of safety culture in the targeted railroads. This report summarizes findings from a systematic review of the 18 SLSI Safety Culture Assessment (SCA) Reports created in 2025 and discusses trends in industry strengths and opportunities for improvement related to safety culture practices. These str ...

08/10/2026

Title : Short Line Safety Institute: 2025 Systematic Review [Research Results] Creator(s) : Kidda, Starr;Leone, Julia;Lacey, Samantha; Corporate Creator(s) : United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology;Short Line Safety Institute; Published Date : 2026-07-01 Report Number : RR 26-04 URL : https://rosap.ntl.bts.gov/view/dot/92843
Kidda, S., Leone, J., & Lacey, S. (2026). Short Line Safety Institute: 2025 Systematic Review [Research Results] (Report No. RR 26-04). United States. Department of Transportation. Federal Railroad Administration. https://rosap.ntl.bts.gov/view/dot/92843

Kidda, Starr, Julia Leone, and Samantha Lacey. Short Line Safety Institute: 2025 Systematic Review [Research Results]. Report no. RR 26-04. United States. Department of Transportation. Federal Railroad Administration, 2026. https://rosap.ntl.bts.gov/view/dot/92843.

Kidda, Starr, et al. Short Line Safety Institute: 2025 Systematic Review [Research Results]. United States. Department of Transportation. Federal Railroad Administration, 2026, Report no. RR 26-04, ROSA P. https://rosap.ntl.bts.gov/view/dot/92843.
Export RIS Citation Information. TY - Brief AU - Kidda, Starr AU - Leone, Julia AU - Lacey, Samantha A2 - United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology A2 - Short Line Safety Institute AB - SLSI conducts an annual analysis to assess the status of safety culture in the targeted railroads. This report summarizes findings from a systematic review of the 18 SLSI Safety Culture Assessment (SCA) Reports created in 2025 and discusses trends in industry strengths and opportunities for improvement related to safety culture practices. These strengths (e.g., employees feel comfortable communicating safety-related issues/concerns to management) and Opportunities for Improvement ("Opportunities," e.g., employees express a desire for more recognition of safe work practices in the field) indicate the status of safety culture in the railroad industry. Lastly, this report introduces new ways SLSI can continue to serve the industry. AN - dot:92843 DA - 2026-07-01 ET - Research Results KW - Annual reviews KW - Railroad safety KW - Safety culture KW - Short line railroads KW - Railroads LA - English PB - United States. Department of Transportation. Federal Railroad Administration PY - 2026 SN - RR 26-04 TI - Short Line Safety Institute: 2025 Systematic Review [Research Results] M3 - Brief N1 - United States N1 - F33315-86-C-5169 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92843 ER -
Formative Evaluation of a Class I Railroad C3RS Pilot Demonstration [Research Results]

Kidda, Starr ;

Howarth, Heidi

2026-07-01 | PDF

The Federal Railroad Administration sponsored Volpe National Transportation Systems Center (Volpe) to conduct a formative evaluation of a Class I railroad's implementation of a Confidential Close Call Reporting System (C3RS) pilot demonstration (Pilot). The goal of the evaluation was to document implementation processes and provide stakeholders wit ...

08/10/2026

Title : Formative Evaluation of a Class I Railroad C3RS Pilot Demonstration [Research Results] Creator(s) : Kidda, Starr;Howarth, Heidi; Corporate Creator(s) : United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology;John A. Volpe National Transportation Systems Center (U.S.). Safety Management and Human Factors Division; Published Date : 2026-07-01 Report Number : RR 26-03 URL : https://rosap.ntl.bts.gov/view/dot/92842
Kidda, S., & Howarth, H. (2026). Formative Evaluation of a Class I Railroad C3RS Pilot Demonstration [Research Results] (Report No. RR 26-03). United States. Department of Transportation. Federal Railroad Administration. https://rosap.ntl.bts.gov/view/dot/92842

Kidda, Starr and Heidi Howarth. Formative Evaluation of a Class I Railroad C3RS Pilot Demonstration [Research Results]. Report no. RR 26-03. United States. Department of Transportation. Federal Railroad Administration, 2026. https://rosap.ntl.bts.gov/view/dot/92842.

Kidda, Starr, and Heidi Howarth Formative Evaluation of a Class I Railroad C3RS Pilot Demonstration [Research Results]. United States. Department of Transportation. Federal Railroad Administration, 2026, Report no. RR 26-03, ROSA P. https://rosap.ntl.bts.gov/view/dot/92842.
Export RIS Citation Information. TY - Brief AU - Kidda, Starr AU - Howarth, Heidi A2 - United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology A2 - John A. Volpe National Transportation Systems Center (U.S.). Safety Management and Human Factors Division AB - The Federal Railroad Administration sponsored Volpe National Transportation Systems Center (Volpe) to conduct a formative evaluation of a Class I railroad's implementation of a Confidential Close Call Reporting System (C3RS) pilot demonstration (Pilot). The goal of the evaluation was to document implementation processes and provide stakeholders with formative feedback to strengthen the Pilot. Volpe collected information from Safety Department leadership and Peer Review Team members and reviewed relevant documentation to identify Pilot strengths and challenges. Volpe drew on prior C3RS evaluation findings to provide stakeholder feedback intended to strengthen the Pilot. AN - dot:92842 DA - 2026-07-01 ET - Research Results KW - Near crashes KW - Pilot studies KW - Safety analysis KW - Railroads KW - C3RS KW - close calls KW - Class I railroad LA - English PB - United States. Department of Transportation. Federal Railroad Administration PY - 2026 SN - RR 26-03 TI - Formative Evaluation of a Class I Railroad C3RS Pilot Demonstration [Research Results] M3 - Brief N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92842 ER -

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