U.S. flag An official website of the United States government.
Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

US Transportation Collection

rosaP Repository & Open Science Access Portal

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.

Showing 181 - 200 of 36368 results
  • A Path Forward for Transit Rider Experience and Safety Lessons from the LA Metro Ambassador Pilot Program
  • Machine Vision Approach to Retroreflectivity Measurements
  • A Computational Tool for the Reliable Prediction of Pavement Performance based on Temperature Data
  • Bismarck Mandan Regional ITS Architecture Update Version 50
  • Investigation of Dolomite Aggregate LongTerm Cementation and Its Potential Advantage for Building Roads
  • Special Crash Investigations OnSite Rollover System Crash Investigation Vehicle 2019 Subaru Outback Limited Location North Carolina Crash Date November 2022
  • Special Crash Investigations OnSite Rollover Crash Investigation Vehicle 2019 Chevrolet Equinox Location California Crash Date October 2022
  • Reliability of Nondestructive Evaluation of Concrete Bridge Decks
  • Reducing Costs in Full Depth Reclamation
  • CenDak Signalized Intersections Traffic Data Collection  2025
  • New NearFault Adjustment Factors for Caltrans Seismic Design Criteria SDC
  • Dataset Supporting Files
  • Determining the Impact of CDOT Roadway Construction Projects on Air Quality
  • Develop a Methodology for Pavement Drainage System Rating
  • Effect of Fines on Liquefaction Triggering Analyses
  • Project Development and Utility Coordination as a Partnership Tech Transfer Summary
  • The Effect of Nighttime Lighting Systems on Workers Visibility and Safety
  • The Effect of Nighttime Lighting Systems on Workers Visibility and Safety Tech Transfer Summary
  • Nonmotorist Crashes in the 2024 Crash Investigation Sampling System Traffic Safety Facts
  • Concentration Preserving Deicing Solutions for Higher Ice Melting