Document Library

This primer provides an introduction and background to shared mobility; discusses the government’s role; reviews success stories; examines challenges, lessons learned, and proposed solutions; and concludes with guiding principles for public agencies. The primer provides an overview of current practices in this emerging field, and it also looks toward the future in the evolution and development of shared mobility.

This research project explored the utilization of GDOT’s existing videolog and pavement imaging data for extracting guardrails, rumble strips, and traffic signs. Image-processing-based algorithms were developed, which were tested using both GDOT’s videolog images and the data collected by using the Georgia Tech Sensing Vehicle (GTSV).

The objective of this project is to validate the use of commercial remote sensing and spatial information (CRS&SI) technologies, including emerging 3D line laser imaging technology, mobile LiDAR, image processing algorithms, and GPS/GIS technologies, to improve the transportation asset data collection, condition assessment, and management. Traffic sign asset and pavement asset were used for validation.

As one of the most popular preventive maintenance methods, crack sealing and filling (CS/CF) has been widely used by state highway agencies. Due to stringent highway budgets and the lack of work forces in state highway agencies, it is urgent that CS/CF, as well as other types of pavement preservation methods, be incorporated in a pavement management system (PMS). For this purpose, this research project proposed a systematic framework to study the cost-effectiveness of CS/CF and incorporate CS/CF planning in a PMS.

This final synthesis was published under NCHRP project 20-05(39-13) as NCHRP Synthesis 408. The synthesis outlines the history and current findings on pavement marking warranty specifications, and may be viewed here.

An NCHRP research project which developed the Guide to Maintenance Condition Assessment Systems. The guide provides recommendations for creating, planning, and improving a maintenance condition assessment system.

An NCHRP research project that studied the condition and maintenance methodology of culverts in order to produce a handbook, which provides guidance on efficient planning and rehabilitation techniques.

An NCHRP research project that studied the condition and maintenance methodology of culverts in order to produce a handbook, which provides guidance on efficient planning and rehabilitation techniques.

An NCHRP research project conducted from 2014 to 2016 to analyze current risk management practices in State DOTs, and to produce a guidebook of risk management strategies, processes, and tools.

This NCHRP research project, conducted between 2007 and 2009, explores a process by which state DOTs can make decisions regarding fleet management. The research highlights the outsourcing and privatization of maintenance, and culminated in the creation of NCHRP Report 692, produced under project 13-03A. To view the report, click here.

The goals of this project are to produce a report of 2004-2008 Virginia Work-Zone Crash Facts as a stand-alone document and to develop a more robust set of work-zone safety performance measures for Virginia. The researchers will consider both program-level and project-level measures. All roads that VDOT administers will be included for the program-level measures. However, for the project-level measures, the scope is limited to interstate highways because of data availability.

This report is the final report in a series of five examining the complementary effect risk management has on asset management. This report focuses on physical, seismic, climactic, and threats of other types can be managed. The focus of this report, as opposed to the previous four, if the focus on just the negative effects of uncertainty, as opposed to looking at both the positive and negative effects. Such risks are normally external and difficult to know precisely when they will occur, although their occurrence is inevitable over the long term, like an earthquake or a major blizzard.