The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations.
Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.
The primary goal of this research was to use large streams of truck-GPS data to analyze travel routes (or paths) chosen by freight trucks to travel between different origin and destination (OD) location pairs in metropolitan regions of Florida. Two specific objectives were pursued. The first objective was to measure and analyze the diversity in tra
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Understanding unsaturated expansive soil has always been a major challenge for soil scientists and engineers. Due to presence of high quantity of montmorillonite mineral in the Moreland clay in northern Louisiana, structural damage due to soil heave/shrinkage has always been a key concern for geotechnical engineers. In this research, a state-of-the
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Our work evaluated the effectiveness of Recovery Act highway infrastructure spending for the specific purpose of creating construction jobs and boosting overall employment in specific regions—such as Economically Distressed Areas (EDAs)—during the great recession. For this purpose, we built a new database using the full project-level records from R
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Commerce and quality of life in Texas depend on the daily delivery of millions of tons of goods shipped efficiently and affordably over Texas’ multimodal freight transportation system. Continued growth of business to consumer e-commerce has increased demand for package shipping services, and rural areas face a particular challenge in finding effici
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CTfastrak, a bus rapid transit service connecting four municipalities (Hartford, West Hartford, Newington, and New Britain) in Central Connecticut (CT), received final funding approval in 2011 and opened for service in March 2015. This new service may be encouraging transit-oriented development (TOD) along the busway, including new retail stores, r
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This project empirically investigates the traffic flow estimations from different types of data collected from two types of mobile platforms – transit buses in service operations and a van driven to emulate bus coverage – that repeatedly traverse roadway segments. At the root of this approach are probe vehicle-based studies and, in particular, the
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United States. National Transportation Safety Board
2017-07-25
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In this safety study, the National Transportation Safety Board (NTSB) examines causes of and trends in speeding-related passenger vehicle crashes and countermeasures to prevent these crashes. The countermeasures presented represent several, of many, potential solutions to the issue of speeding-related crashes. They do not address every cause of spe
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Previously, induced land use change estimates considered only the extensive margin; that is, adding to harvested area by converting forest or pasture to cropland. However, recent data suggests that some of the increase in global harvested area comes from more intensive use of existing cropland, such as double cropping or use of unused land. This pr
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Flood frequency analyses for the Black Hills area have especially large uncertainties and are especially important for planning purposes because of a history of extremely large and damaging floods, such as the extreme floods of June 9 10, 1972. Geology, topography, and climatology are additional complicating factors for flood frequency characteriza
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The CSU NEXTRANS team extended its work on potential benefits to Chicago State University staff, faculty and students, as well as the surrounding community of an improved 95th Street Metra stop by performed an electronic survey of staff and faculty on their transportation patterns and a focus group on community transportation needs and the 95th Str
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1. Introduction a. World-wide Development of High-Speed Rail (Japan, Europe, China) b. High-speed Rail in the U.S. 2. High-Speed Rail Infrastructure a. Geometric Design of High Speed Rail i. Horizontal Curve ii. Vertical Curve iii. Grade and Turnout b. Track Design i. High Speed Rail Aero-structure ii. Track Structure iii. Earthwork and Track Bed D
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This report describes operational data analysis and modeling of arterial networks with signalized intersections as follows: The setup for data collection, analysis and simulation is presented in Section 2.1. Detailed analysis of collected signal phasing and traffic data is provided in section 2.2. Arterial traffic and platoon modeling is described
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United States. Department of Transportation. Federal Aviation Administration
2017-07-10
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This advisory circular (AC) provides guidance to sponsors of airport projectsdeveloped under the Airport Improvement Program (AIP) to meet the requirementsof the Uniform Relocation Assistance and Real Property Acquisition Policies Actof 1970 (Pl 91-646, as amended) and the Regulations of the Office of theSecretary of Transportation, 49 CFR Part 24.
This report primarily focuses on the spatial variation of air passenger trip times through the dual transport modes, ground access to and flight routing between airports, in an empirical data-driven assessment. Expected journeys from individual census tracts in the contiguous 48 states (and D.C.) are derived by connecting each tract with its neighb
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The METRANS Transportation Center has been providing technical assistance to the California Governor’s Office of Business and Economic Development (GO-Biz) and the California Air Resources Board (CARB) in support of implementing the California Sustainable Freight Action Plan (CSFAP). The work is focused on Action 6 of the CSFAP:ACTION 6: Convene in
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Proof rolling provides a method to examine the entire subgrade surface as a compliment to standard random acceptance testing. Proof rolling requires established criteria that account for the interplay of equipment parameters and soil characteristics, technique, and other specifics of the project to allow for proper interpretation. The researchers c
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This paper presents a stochastic multi-agent optimization model that supports energy infrastruc-ture planning under uncertainty. The interdependence between di?erent decision entities in thesystem is captured in an energy supply chain network, where new entrants of investors competeamong themselves and with existing generators for natural resources
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Research Benefits• Confirmed that Wisconsin’s current CIP rapid-repair concretes perform adequately• Recommended mixture improvements to alleviate construction difficulties• Determined that increasing the durability of rapid repair concretes could cut maintenance and rehabilitation costs by nearly 50 percent over standard eight-year service life re
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Large numbers of conventionally reinforced concrete bridges (RC) were constructed during the interstatehighway expansion of the 1950’s and remain in the national inventory. Coincidently, deformed steel reinforcingbars were standardized. The standardized deformation requirements dramatically changed bond provisions in allrelevant design codes and de
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