As the evidence mounts that HOV lanes will not produce expected reductions in congestion and emission, alternatives are being sought. High occupancy toll (HOT) lanes and truck only lanes are attractive alternatives. In this study, a region-wide system of new HOV lanes, HOT lanes, and truck only...

Many regional agencies model travel demand without feeding assigned travel times back to the trip distribution step. This method saves time and money but is likely to be biased in favor of build alternatives because it would underproject trip lengthening induced by the added capacity. Emissions...

In this paper, we simulate the effects of policies intended to reduce auto travel, emissions, and fuel use. We review previous studies of auto pricing and land use policies, both the empirical research and simulation studies. We then describe our methods for modeling the Sacramento, California,...

The automation of urban freeways is intended to reduce travel time costs, reduce direct (distance) costs, improve the safety of travel, create smoother vehicle operation, increase freeway lane capacity, and improve the comfort of travelers. This study performs a financial analysis of the first...

U.S. law requires consistent land use and transportation plans for metropolitan regions and the evaluation of economic efficiency for projects and plans. Policies being examined for reducing travel demand include land use policies. The Clean Air Act regulations require the proper simulation of...

The need for more comprehensive traveler welfare measures is highlighted by the U.S. Intermodal Surface Transportation Efficiency Act (1991) requirement that transportation projects and plans be evaluated for economic efficiency. However, to date, there has been a discrepancy between this...

The demand for rail transit funds greatly exceeds available monies. Worse, there is wide-spread disagreement over the wisdom of building rail systems in American cities. The Urban Mass Transportation Administration’s (UMTA’s) transit analysis methods have relied on...

Various problems in the regional modeling of ITS are discussed. We then review previous research on the effects of ITS highway and transit technologies on travel and emissions, and critique these studies. Then, we outline our past research methods and findings and describe the weaknesses of...

Population growth, continuing suburbanization, and higher labor-force-participation rates, combined with a virtual halt in new freeway construction, have led to rapid increases in traffic congestion in the U.S. This congestion is costly, for example, the cost of highway congestion in the Lose...

This study demonstrates the sequential linking of two types of models to permit the comprehensive evaluation of regional transportation and land use policies. First, we operate an integrated urban model (TRANUS), which represents both land and travel markets with zones and networks. The travel...