Open-graded aggregates (OGAs) are a common type of structural backfill used to build a variety of transportation earthworks. Therefore, the Federal Highway Administration (FHWA) has made a concerted effort over the past decade to better understand and quantify the strength-deformation characteristics of OGAs through large-scale direct shear (LSDS)
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Nicks, J., Adams, M. T., Culbreth, N., & Gebrenegus, T. (2023). Variability in the Engineering Properties of Open-Graded Aggregate Backfills: A Large-Scale Direct Shear Round-Robin Study (Report No. FHWA-HRT-23-046). United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology. https://rosap.ntl.bts.gov/view/dot/71851
Nicks, Jennifer, Michael T. Adams, Nicholas Culbreth, and T. Gebrenegus. Variability in the Engineering Properties of Open-Graded Aggregate Backfills: A Large-Scale Direct Shear Round-Robin Study. Report no. FHWA-HRT-23-046. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology, 2023. https://rosap.ntl.bts.gov/view/dot/71851.
Nicks, Jennifer, et al. Variability in the Engineering Properties of Open-Graded Aggregate Backfills: A Large-Scale Direct Shear Round-Robin Study. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology, 2023, Report no. FHWA-HRT-23-046, ROSA P. https://rosap.ntl.bts.gov/view/dot/71851.
This document details the process that the Volpe National Transportation Systems Center (Volpe) used to develop travel forecasting models for the Federal Highway Administration (FHWA). These models enable FHWA to forecast future changes in the use of passenger and freight vehicles (as measured by the number of vehicle-miles traveled, or VMT) that a
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Pickrell, D., Pace, D., Wishart, J., & Roycroft, C. (2023). FHWA Travel Analysis Framework: Development of VMT Forecasting Models for Use by the Federal Highway Administration. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/88156
Pickrell, Don, David Pace, Jacob Wishart, and Claire Roycroft. FHWA Travel Analysis Framework: Development of VMT Forecasting Models for Use by the Federal Highway Administration. United States. Department of Transportation. Federal Highway Administration, 2023. https://rosap.ntl.bts.gov/view/dot/88156.
Pickrell, Don, et al. FHWA Travel Analysis Framework: Development of VMT Forecasting Models for Use by the Federal Highway Administration. United States. Department of Transportation. Federal Highway Administration, 2023, ROSA P. https://rosap.ntl.bts.gov/view/dot/88156.
The Federal Highway Administration Road Weather Management Program started development of Integrated Modeling for Road Condition Prediction (IMRCP) in 2015 to provide data and decision support for transportation system management and operations in weather events. IMRCP gathers traffic and weather data and forecasts. It creates new forecast data for
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Garrett, K., Ma, J., Sanchez, R., Wolshon, B., & Neuner, M. (2023). Integrated Modeling for Road Condition Prediction Phase 4: Final Report (Report No. FHWA-HOP-23-003). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/74645
Garrett, Kyle, Jiaqi Ma, Robert Sanchez, Brian Wolshon, and Michelle Neuner. Integrated Modeling for Road Condition Prediction Phase 4: Final Report. Report no. FHWA-HOP-23-003. United States. Department of Transportation. Federal Highway Administration, 2023. https://rosap.ntl.bts.gov/view/dot/74645.
Garrett, Kyle, et al. Integrated Modeling for Road Condition Prediction Phase 4: Final Report. United States. Department of Transportation. Federal Highway Administration, 2023, Report no. FHWA-HOP-23-003, ROSA P. https://rosap.ntl.bts.gov/view/dot/74645.
Modern nondestructive evaluation (NDE) technologies offer an expanding suite of geophysical techniques to detect and locate buried utilities. This project focused on identifying promising technologies that merit expanded application and mainstream deployment by State transportation departments. The project team applied a staged approach to the effo
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Reiter, D., Napoli, V., Cohen, J. P., Boone, S., Moseley, P., Alhasan, A., & Salerno, J. (2023). Availability, Feasibility, and Reliability of Available Nondestructive Evaluation (NDE) Technologies for Detecting and Locating Buried Utilities: Final Report (Report No. FHWA-HRT-23-037). United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development. https://rosap.ntl.bts.gov/view/dot/72524
Reiter, Delaine, Vanessa Napoli, Jeffrey P Cohen, Shane Boone, Patrick Moseley, Ahmad Alhasan, and Jeremy Salerno. Availability, Feasibility, and Reliability of Available Nondestructive Evaluation (NDE) Technologies for Detecting and Locating Buried Utilities: Final Report. Report no. FHWA-HRT-23-037. United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development, 2023. https://rosap.ntl.bts.gov/view/dot/72524.
Reiter, Delaine, et al. Availability, Feasibility, and Reliability of Available Nondestructive Evaluation (NDE) Technologies for Detecting and Locating Buried Utilities: Final Report. United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development, 2023, Report no. FHWA-HRT-23-037, ROSA P. https://rosap.ntl.bts.gov/view/dot/72524.
This summary report shares the findings of an Exploratory Advanced Research Program project that investigated strategies for expanding the use of fly ash (FA) in concrete production. With an unprecedented massive concrete and FA dataset collection of 40,000 data records, the team conducted a series of experiments that used advanced material charact
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Sant, G., Bauchy, M., Neithalath, N., & Kumar, A. (2023). Physically Informed Data-Driven Methods for Greatly Enhancing the Use of Heterogeneous Supplementary Cementitious Materials in Transportation Infrastructure (Report No. FHWA-HRT-23-040). United States. Federal Highway Administration. Office of Corporate Research, Technology, and Innovation Management. https://rosap.ntl.bts.gov/view/dot/71859
Sant, G., M. Bauchy, Narayanan Neithalath, and A. Kumar. Physically Informed Data-Driven Methods for Greatly Enhancing the Use of Heterogeneous Supplementary Cementitious Materials in Transportation Infrastructure. Report no. FHWA-HRT-23-040. United States. Federal Highway Administration. Office of Corporate Research, Technology, and Innovation Management, 2023. https://rosap.ntl.bts.gov/view/dot/71859.
Sant, G., et al. Physically Informed Data-Driven Methods for Greatly Enhancing the Use of Heterogeneous Supplementary Cementitious Materials in Transportation Infrastructure. United States. Federal Highway Administration. Office of Corporate Research, Technology, and Innovation Management, 2023, Report no. FHWA-HRT-23-040, ROSA P. https://rosap.ntl.bts.gov/view/dot/71859.
Traffic management systems (TMSs) and their operating centers, known as traffic management centers (TMCs), support real-time and offline functions, services, actions, activities, and related tasks or decisions (e.g., administrative and operational). In this context, decision-support tools (DSTs) are not generally used as stand-alone solutions; rath
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Miller, K., Horner, J., Adler, J., & Sanchez, R. (2023). Decision Support Methods and Tools for Traffic Management Systems (Report No. FHWA-HRT-23-071). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/72448
Miller, Kevin, John Horner, Jeff Adler, and Robert Sanchez. Decision Support Methods and Tools for Traffic Management Systems. Report no. FHWA-HRT-23-071. United States. Department of Transportation. Federal Highway Administration, 2023. https://rosap.ntl.bts.gov/view/dot/72448.
Miller, Kevin, et al. Decision Support Methods and Tools for Traffic Management Systems. United States. Department of Transportation. Federal Highway Administration, 2023, Report no. FHWA-HRT-23-071, ROSA P. https://rosap.ntl.bts.gov/view/dot/72448.
The Federal Highway Administration (FHWA) seeks to understand whether user-based alternative revenue mechanisms that utilize a user fee structure can help maintain the long-term solvency of the Highway Trust Fund and whether they can be implemented nationally at some time in the future. This report presents independent evaluation results of the Eas
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Sethi, S., Robbins, J., Van Duren, D., & Agrawal, A. W. (2023). Surface Transportation System Funding Alternatives Phase II Evaluation: Mileage-Based User Fee Pilot by the Eastern Transportation Coalition (Report No. FHWA-HOP-21-049). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/77180
Sethi, Sonika, Justin Robbins, Drew Van Duren, and Asha Weinstein Agrawal. Surface Transportation System Funding Alternatives Phase II Evaluation: Mileage-Based User Fee Pilot by the Eastern Transportation Coalition. Report no. FHWA-HOP-21-049. United States. Department of Transportation. Federal Highway Administration, 2023. https://rosap.ntl.bts.gov/view/dot/77180.
Sethi, Sonika, et al. Surface Transportation System Funding Alternatives Phase II Evaluation: Mileage-Based User Fee Pilot by the Eastern Transportation Coalition. United States. Department of Transportation. Federal Highway Administration, 2023, Report no. FHWA-HOP-21-049, ROSA P. https://rosap.ntl.bts.gov/view/dot/77180.
This project developed a handbook and supporting materials for working with travel time data in the development of travel time reliability performance assessment and reporting. The intent of the handbook is twofold: to provide practitioners with the ability to understand the differences in reliability measures derived from the different data source
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Margiotta, R., Ge, R., & Motamed, M. (2023). Application of Travel Time Data and Statistics to Travel Time Reliability Analyses Handbook and Support Materials (Report No. FHWA-HOP-21-058). United States. Department of Transportation. Federal Highway Administration. Office of Operations. https://rosap.ntl.bts.gov/view/dot/70419
Margiotta, Richard, Richard Ge, and Moggan Motamed. Application of Travel Time Data and Statistics to Travel Time Reliability Analyses Handbook and Support Materials. Report no. FHWA-HOP-21-058. United States. Department of Transportation. Federal Highway Administration. Office of Operations, 2023. https://rosap.ntl.bts.gov/view/dot/70419.
Margiotta, Richard, et al. Application of Travel Time Data and Statistics to Travel Time Reliability Analyses Handbook and Support Materials. United States. Department of Transportation. Federal Highway Administration. Office of Operations, 2023, Report no. FHWA-HOP-21-058, ROSA P. https://rosap.ntl.bts.gov/view/dot/70419.
United States. Department of Transportation. Federal Highway Administration. Office of Natural Environment
2023-07-01
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Air Quality + Sustainable Transportation Highlights
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This brief newsletter keeps transportation stakeholders up-to-date on various issues related to transportation and climate change.
United States. Department of Transportation. Federal Highway Administration. Office of Natural Environment (2023). Air Quality + Sustainable Transportation Highlights: July/August 2023 (Report No. FHWA-HEP-23-044). United States. Department of Transportation. Federal Highway Administration. Office of Natural Environment. https://rosap.ntl.bts.gov/view/dot/77011
United States. Department of Transportation. Federal Highway Administration. Office of Natural Environment. Air Quality + Sustainable Transportation Highlights: July/August 2023. Report no. FHWA-HEP-23-044. United States. Department of Transportation. Federal Highway Administration. Office of Natural Environment, 2023. https://rosap.ntl.bts.gov/view/dot/77011.
United States. Department of Transportation. Federal Highway Administration. Office of Natural Environment Air Quality + Sustainable Transportation Highlights: July/August 2023. United States. Department of Transportation. Federal Highway Administration. Office of Natural Environment, 2023, Report no. FHWA-HEP-23-044, ROSA P. https://rosap.ntl.bts.gov/view/dot/77011.
United States. Department of Transportation. Federal Highway Administration. Office of Operations
2023-07-01
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Over the past decade, travel time reliability has emerged as a key concept for assessing and managing the performance of the transportation system. Simply put, travel time reliability describes how personal mobility changes from day-to-day for trips made at the same time. Savvy commuters understand that travel times for their work trips, which tend
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United States. Department of Transportation. Federal Highway Administration. Office of Operations (2023). Analyzing Travel Time Reliability: Data and Analysis Methods (Report No. FHWA-HOP-22-086). United States. Department of Transportation. Federal Highway Administration. Office of Operations. https://rosap.ntl.bts.gov/view/dot/70451
United States. Department of Transportation. Federal Highway Administration. Office of Operations. Analyzing Travel Time Reliability: Data and Analysis Methods. Report no. FHWA-HOP-22-086. United States. Department of Transportation. Federal Highway Administration. Office of Operations, 2023. https://rosap.ntl.bts.gov/view/dot/70451.
United States. Department of Transportation. Federal Highway Administration. Office of Operations Analyzing Travel Time Reliability: Data and Analysis Methods. United States. Department of Transportation. Federal Highway Administration. Office of Operations, 2023, Report no. FHWA-HOP-22-086, ROSA P. https://rosap.ntl.bts.gov/view/dot/70451.
United States. Department of Transportation. Federal Highway Administration
2023-07-01
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This document provides an overview of the Federal Highway Administration (FHWA) Federal-aid Division State Planning and Research Subpart B (SPR-B) Program. State planning and research (SPR) funds establish a comprehensive framework for making transportation investment decisions and carrying out transportation research activities throughout a State.
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United States. Department of Transportation. Federal Highway Administration (2023). FHWA Federal-Aid Division State Planning and Research Subpart B (SPR-B) Program (Report No. FHWA-HRT-23-050). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/71858
United States. Department of Transportation. Federal Highway Administration. FHWA Federal-Aid Division State Planning and Research Subpart B (SPR-B) Program. Report no. FHWA-HRT-23-050. United States. Department of Transportation. Federal Highway Administration, 2023. https://rosap.ntl.bts.gov/view/dot/71858.
United States. Department of Transportation. Federal Highway Administration FHWA Federal-Aid Division State Planning and Research Subpart B (SPR-B) Program. United States. Department of Transportation. Federal Highway Administration, 2023, Report no. FHWA-HRT-23-050, ROSA P. https://rosap.ntl.bts.gov/view/dot/71858.
United States. Federal Highway Administration. Office of Bridges and Structures
2023-07-01
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Benefit-cost analysis for bridge preservation, rehabilitation, repair, and protection projects often requires a different approach than that used for other operational improvements. Other operational improvements typically do not affect the day-to-day experience of users of the facility. Rather, the improvements are aimed at reducing ongoing mainte
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United States. Federal Highway Administration. Office of Bridges and Structures (2023). Estimating Benefits for Bridge Protection Improvements (Report No. FHWA-HIF-23-034). United States. Federal Highway Administration. Office of Bridges and Structures. https://rosap.ntl.bts.gov/view/dot/71835
United States. Federal Highway Administration. Office of Bridges and Structures. Estimating Benefits for Bridge Protection Improvements. Report no. FHWA-HIF-23-034. United States. Federal Highway Administration. Office of Bridges and Structures, 2023. https://rosap.ntl.bts.gov/view/dot/71835.
United States. Federal Highway Administration. Office of Bridges and Structures Estimating Benefits for Bridge Protection Improvements. United States. Federal Highway Administration. Office of Bridges and Structures, 2023, Report no. FHWA-HIF-23-034, ROSA P. https://rosap.ntl.bts.gov/view/dot/71835.
United States. Department of Transportation. Federal Highway Administration
2023-07-01
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This research plan details how walking, biking, and other sustainable modes of transportation are critical options in communities throughout the United States, particularly for economically disadvantaged communities. However, fatalities among pedestrians and bicyclists have been increasing even faster than the overall fatalities among all road user
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United States. Department of Transportation. Federal Highway Administration (2023). Federal Highway Administration Vulnerable Road User Research Plan. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/72701
United States. Department of Transportation. Federal Highway Administration. Federal Highway Administration Vulnerable Road User Research Plan. United States. Department of Transportation. Federal Highway Administration, 2023. https://rosap.ntl.bts.gov/view/dot/72701.
United States. Department of Transportation. Federal Highway Administration Federal Highway Administration Vulnerable Road User Research Plan. United States. Department of Transportation. Federal Highway Administration, 2023, ROSA P. https://rosap.ntl.bts.gov/view/dot/72701.
This research project explores and evaluates the effectiveness of different static late merge signing for use on arterials. The research team collected data through a laboratory and a field study. The laboratory study assessed the comprehension of the different sign alternatives and determined which sign series to evaluate in the field. The field s
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Katz, B. J., Kissner, E., Filler, E., Jackson, S., Vaughan, C. L., & Cunningham, C. M. (2023). Evaluation of Lane Reduction and Late Merge Signing (Report No. FHWA-HRT-23-070). United States. Federal Highway Administration. Office of Research, Development, and Technology. https://rosap.ntl.bts.gov/view/dot/71855
Katz, Bryan J, Erin Kissner, Erin Filler, Steve Jackson, Christopher L. Vaughan, and Christopher M. Cunningham. Evaluation of Lane Reduction and Late Merge Signing. Report no. FHWA-HRT-23-070. United States. Federal Highway Administration. Office of Research, Development, and Technology, 2023. https://rosap.ntl.bts.gov/view/dot/71855.
Katz, Bryan J, et al. Evaluation of Lane Reduction and Late Merge Signing. United States. Federal Highway Administration. Office of Research, Development, and Technology, 2023, Report no. FHWA-HRT-23-070, ROSA P. https://rosap.ntl.bts.gov/view/dot/71855.
The purpose of this report is to provide an appreciation of the current practices, new methods, emerging technologies, and approaches to improve the active management and operation of a traffic management system (TMS). As agencies plan to implement or explore improving a TMS, they are facing a number of challenges, such as performance, costs for ex
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Kuciemba, S., Jacobson, L., Mizuta, A., & Nguyen, D. (2023). Review of Traffic Management Systems — Current Practice (Report No. FHWA-HRT-23-051). United States. Department of Transportation. Federal Highway Administration. Office of Operations. https://rosap.ntl.bts.gov/view/dot/72446
Kuciemba, Steve, Les Jacobson, Arianne Mizuta, and David Nguyen. Review of Traffic Management Systems — Current Practice. Report no. FHWA-HRT-23-051. United States. Department of Transportation. Federal Highway Administration. Office of Operations, 2023. https://rosap.ntl.bts.gov/view/dot/72446.
Kuciemba, Steve, et al. Review of Traffic Management Systems — Current Practice. United States. Department of Transportation. Federal Highway Administration. Office of Operations, 2023, Report no. FHWA-HRT-23-051, ROSA P. https://rosap.ntl.bts.gov/view/dot/72446.
United States. Department of Transportation. Federal Highway Administration
2023-07-01
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The sixth round of the Every Day Counts (EDC-6) initiative selected electronic ticketing (e-Ticketing) for rapid deployment among highway agencies to enhance work zone safety, improve quality, and realize cost savings through digitalization. Highway construction projects generate massive amounts of valuable data that historically were communicated
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United States. Department of Transportation. Federal Highway Administration (2023). E-Ticketing Implementation for the Luis A. Ferré Expressway (PR-52) [Application Note] (Report No. FHWA-HIF-24-058). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/80606
United States. Department of Transportation. Federal Highway Administration. E-Ticketing Implementation for the Luis A. Ferré Expressway (PR-52) [Application Note]. Report no. FHWA-HIF-24-058. United States. Department of Transportation. Federal Highway Administration, 2023. https://rosap.ntl.bts.gov/view/dot/80606.
United States. Department of Transportation. Federal Highway Administration E-Ticketing Implementation for the Luis A. Ferré Expressway (PR-52) [Application Note]. United States. Department of Transportation. Federal Highway Administration, 2023, Report no. FHWA-HIF-24-058, ROSA P. https://rosap.ntl.bts.gov/view/dot/80606.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2023-07-01
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Traffic Volume Trends is a monthly report based on hourly traffic count data reported by the States. These data are collected at approximately 5,000 continuous traffic counting locations nationwide and are used to estimate the percent change in traffic for the current month compared with the same month in the previous year. Estimates are re-adjuste
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information (2023). Traffic Volume Trends: July 2023. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. https://rosap.ntl.bts.gov/view/dot/68941
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. Traffic Volume Trends: July 2023. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2023. https://rosap.ntl.bts.gov/view/dot/68941.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information Traffic Volume Trends: July 2023. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2023, ROSA P. https://rosap.ntl.bts.gov/view/dot/68941.
This Technical Brief summarizes techniques successfully used by State DOTs and Federal Lands Highway Divisions to implement use of cold asphalt and hot in-place asphalt recycling technologies.
Hand, A. J., & Aschenbrener, T. (2023). Asphalt Pavement Recycling Technologies [Tech Brief] (Report No. FHWA-HIF-23-036). United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements. https://rosap.ntl.bts.gov/view/dot/89857
Hand, Adam J and Tim Aschenbrener. Asphalt Pavement Recycling Technologies [Tech Brief]. Report no. FHWA-HIF-23-036. United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements, 2023. https://rosap.ntl.bts.gov/view/dot/89857.
Hand, Adam J, and Tim Aschenbrener Asphalt Pavement Recycling Technologies [Tech Brief]. United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements, 2023, Report no. FHWA-HIF-23-036, ROSA P. https://rosap.ntl.bts.gov/view/dot/89857.
2023-06-30
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FHWA Highway History Website Articles
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The parkway concept, intended for recreational driving, embodied many design concepts that would be integral to expressways, including wide right-of-way, control of access, elimination of grade crossings with other highways, and separated highway lanes that were blended into the contours of the land. Taking the parkway concept a step further, a New
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Weingroff, R. F. (2023). Edward M. Bassett the Man Who Gave us "Freeway". United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/75780
Weingroff, Richard F.. Edward M. Bassett the Man Who Gave us "Freeway". United States. Department of Transportation. Federal Highway Administration, 2023. https://rosap.ntl.bts.gov/view/dot/75780.
Weingroff, Richard F. Edward M. Bassett the Man Who Gave us "Freeway". United States. Department of Transportation. Federal Highway Administration, 2023, ROSA P. https://rosap.ntl.bts.gov/view/dot/75780.
United States. Department of Transportation. Federal Highway Administration
2023-06-30
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FHWA Highway History Website Articles
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A 1915/1916 map of the stretch of the Pikes Peak Ocean to Ocean Highway from Norton, Kansas to Colby, Kansas.
United States. Department of Transportation. Federal Highway Administration (2023). Norton, Kan., to Colby, Kan. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/76404
United States. Department of Transportation. Federal Highway Administration. Norton, Kan., to Colby, Kan. United States. Department of Transportation. Federal Highway Administration, 2023. https://rosap.ntl.bts.gov/view/dot/76404.
United States. Department of Transportation. Federal Highway Administration Norton, Kan., to Colby, Kan. United States. Department of Transportation. Federal Highway Administration, 2023, ROSA P. https://rosap.ntl.bts.gov/view/dot/76404.
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