TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2396 consists of 16 pages that explore collisions in freeway traffic; self-learning adaptive ramp metering; macroscopic travel time reliability diagrams for freeway networks; the impact of heavy vehicles on fr
Both the Dynamic Mobility Applications (DMA) and Active Transportation and Demand Management (ATDM) Programs have similar overarching goals to improve surface transportation system efficiency and individual traveler mobility. However, each program has a unique research approach seeking to meet th
As part of the Federal Highway Administration’s (FHWA) Active Transportation and Demand Management (ATDM) Foundational Research, this ATDM Analysis, Modeling and Simulation (AMS) Concept of Operations (CONOPS) provides the description of the ATDM Analysis Modeling and Simulation (AMS) system that
This study identifies 58 roundabout corridors in the United States as of 2011. There is diversity among these corridors in terms of length, roundabout spacing, number of lanes, surrounding land use, previous control (if not a new facility), and reasons for the selection of roundabouts.
This synthesis documents the state of the practice associated with designing, implementing, and operating ATM on arterials. Of particular interest to this study has been information on strategies used to actively manage traffic and congestion on arterials; situations and operating conditions in w
This report provides guidance on the procurement of intelligent transportation systems (ITS), including variable message signs, traffic detectors, signal controllers, and a variety of other hardware and software that entails applications of advanced electronics and information management to regul
The report is based on a series of case studies, mainly from the United States, that describe successful business processes. One case study on active traffic management from the United Kingdom is also presented. The case studies show how business processes were successfully reengineered in operat
Purdue University conducted research on traffic signal performance measures, and collected data relating to events like changes in detector and signal phase states. This is a report done detailing the data collection and management--how it was done and where the data was collected. A few of the f
The purpose of this project was to estimate the impact of weather on U.S. roadway freight operations. It was already known that the freight sector of transportation could be greater than $600 billion of total gross domestic product, and 70 percent of that total value is moved by truck. Therefore,
This report is an expansion on a study completed in 2008 which examined the costs of crashes to society. The results of that study are then compared with the costs of congestion on a per person basis. Overall, the cost of crashes per person is much higher than the cost of congestion per pers
