Inappropriate traffic speeds are a major cause of traffic fatalities. The use of lighting and visual information such as signage could assist in encouraging appropriate driving speeds. Along sharp roadway curves, an overall reduction in driving speed might be desirable to prevent rollover crashes. At other locations, such as those prone to chronic congestion, uniformity of vehicle speeds might be desirable in order to optimize safety and traffic flow.

Anti-icing, deicing and pre-wetting methods have become common for winter maintenance of roads. Brine (23%salt solution) is the most common material for anti-icing, deicing and pre-wetting processes. Typically brine is prepared from rock salt. There are very few studies that have investigated the use of naturally occurring brine for anti-icing and deicing. This study focused on the use of naturally occurring brine in the Syracuse, New York area for winter roadway maintenance.

This report presents a new approach for evaluation and maintenance of existing concrete bridges; an active preventive maintenance approach, which costs just fraction of the current passive approach. Such an active preventive maintenance approach requires chemical detection of potential deterioration problems before they even start.

This paper reports on a natural experiment, which studied groups of commuters who are equivalent in most important demographic respects, and who had equivalent commuting experiences, but were differentially affected by a new and improved mass transit (rail) route to work. These commuters changed a significant aspect of their commute, but did not change other critical aspects of their lives (e.g., the start and end points of the trips, the jobs they go to, the homes they return to), so that commuting changes were not confounded with other life changes.

On January 25, 2001, the PANYNJ approved a new pricing structure with tolls that varied according to time of day and payment technology. It went into effect on March 25, 2001. The PANYNJ saw the plan as a means for reducing congestion, increasing the use of transit and EZPass, and facilitating commercial traffic control management. The main objective of this project is to monitor the impacts of the time of day pricing initiative, both at the system wide level and at the user level.

The main objective of this project was to evaluate the impact of New York State’s divisible-load permit system for heavy trucks in terms of benefits and costs to society. Under this system, New York State has allowed a fleet of approximately 12,800 power units to operate above the federal limits on gross vehicle weights and axle loads. The system has eleven permit categories corresponding to number of axles, weight limits, and statewide or downstate geographic area of operation.

New York City Transit’s Department of Buses faced a problem of buses frequently breaking down during operation. Two approaches were explored to reduce the number of breakdowns.

This study was undertaken to examine how to introduce bus rapid transit (BRT) in New York City.  In recent years, the idea of bus rapid transit – innovative bus services providing superior speed and convenience to traditional bus service – has attracted growing interest both here and across the United States.  The tremendously successful BRT systems in Bogotá, Colombia and Curitiba, Brazil, have stirred worldwide interest in whether BRT could be introduced elsewhere.  New York, where more passengers use buses than in the next five largest U.S.

This project designed an expert system to advise bridge inspection teams on fatigue and corrosion of steel bridge superstructures. Steel bridge superstructures were selected since they are the most predominate existing bridge superstructure configuration. The expert system development would begin with a pre-inspection stage designed to collect data on the superstructure, determine the primary and secondary load paths and determine the critical details succeptible to fatigue and corrosion vulnerability.

This research report reviews trends in cycling levels, safety, and policies in large North American cities over the past two decades. We analyze aggregate national data as well as cityspecific case study data for nine large cities (Chicago, Minneapolis, Montréal, New York, Portland, San Francisco, Toronto, Vancouver, and Washington, DC).