This report focuses on geometric design treatments that can be used to reduce delays due to nonrecurrent congestion. The report provides a method for incorporating the economic savings due to delay reduction and due to reliability improvement, respectively for specific design treatments duri
This document classifies highway design treatments that may be used to reduce nonrecurrent congestion and improve the reliability of urban and rural freeways.
This product is accompanied by a report titled Identification and Evaluation of the Cost-Effectiveness of Highway Design Feature
This document provides guidance on work zone performance measurement, including data source identification, selection of performance measures, and data collection, assessment, and application (computational methods). In the context of highway work zones, there are three major data needs for perfo
The Guide examines the way transportation agencies should be organized to successfully execute operations programs that improve travel time reliability. After the Guide was submitted for publication, the American Association of State Highway and Transportation Officials (AASHTO) converted the SHR
This report provides guidelines for the design, installation, operation, maintenance, and enforcement of wet weather variable speed limit (VSL) systems. The use of VSL systems during inclement weather or other less than ideal conditions can improve safety by decreasing the risks associated with t
This guidebook provides an overview of the mission and functions of transportation management centers (TMCs), emergency operations centers (EOCs), and fusion centers (FCs). Functional areas for each of these centers include:
TMCs – management of traffic control systems and assets, incid