Moisture damage is the progressive deterioration of asphalt mixes by loss of adhesion between asphalt binder and aggregate surface and/or loss of cohesion within the binder due to water. It is a complex phenomenon affected by a variety of factors, and has not been fully understood in the...

Infrastructure management systems help public works agencies decide when and how to maintain, repair, and rehabilitate infrastructure facilities in a cost effective manner. An integral part of an infrastructure management system is a model describing how the different infrastructure facilities...

The Intermodal Surface Transportation Efficiency Act of 1991, calls for closer coordination of intermodal transportation as a method to solve many of today’s transportation problems. The passage of this Act has prompted many engineers and planners to re-assess the potential benefits of...

Motor vehicle emission prediction models have been shown to underestimate emissions by factors of 2 to 3 in some cases. There are many reasons why current models do not predict automobile emissions under ‘real-world’ driving conditions accurately. Among them are: non-representative...

After a half-century of increasing public ownership and rising costs, public transit agencies in the U.S. began to experiment with competitive contracting of their operations during the 1980s. Previous research tells us much about possible cost savings from contracting, but we know relatively...

This study examines the extent to which states have devolved one of the most fundamental decisions in transportation policy – whether to use taxation powers to fund transportation improvements – to local and regional governments. The purpose of the study is to generate a baseline...

As there are currently no retail markets for either hydrogen as a transportation fuel or fuel cell vehicles, any discussion of such markets necessarily prospects the future. To do so, we must evoke an image of the future. Such a task is inherently uncertain – many forecasts have been...

With the increased application of the activity based approach comes the inherent need to incorporate more detail regarding behavior. This need for detail has in turn created a need for both a deeper understanding and theoretical basis for behavior, and the incorporation of data collection and...

We estimate how motorists value their time savings and characterize the degree of heterogeneity in these values by observable traits. We obtain these estimates by analyzing the choices that commuters make in a real market situation, where they are offered a free-flow alternative to congested...

With the success of Hybrid Electric Vehicles (HEVs) in the automobile market, Plug-In Hybrid Electric Vehicles (PHEVs) are emerging as the next evolution of this attractive alternative. PHEV market penetration is expected to lead to lower gasoline consumption and less emission. The main...