Ernest Cockrell

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Transportation Research Board is to provide leadership in transportation innovation and progress through research and information exchange, conducted within a setting that is objective, interdisciplinary, and multimodal. The Transportation Research Board is distributing this circular to make the information contained herein available for use by individual(More)
resources of the entire scientific and technical communities to bear on national problems through its volunteer advisory committees. The Transportation Research Board is distributing this Circular to make the information contained herein available for use by individual practitioners in state and local transportation agencies, researchers in academic(More)
Subscriber Category IB energy and environment Transportation Research Board publications are available by ordering individual publications directly from the TRB Business Office, through the Internet at or, or by annual subscription through organizational or individual affiliation with TRB. Affiliates and library(More)
Models of residential and workplace location choice prevalent in the literature often assume that one choice dimension is exogenous to the other. In our view, a broad and uniform assumption that one choice dimension is exogenous and influences the other is too strong to use as the foundation for current behavioral research or applied policy analysis. We(More)
Systematic, well-designed research provides the most effective approach to the solution of many problems facing highway administrators and engineers. Often, highway problems are of local interest and can best be studied by highway departments individually or in cooperation with their state universities and others. However, the accelerating growth of highway(More)
The timing and duration of an activity episode are two important temporal aspects of activitytravel behavior. Understanding the causal relationship between these two variables would be useful in the development of activity-based travel demand modeling systems. This paper investigates the relationship between these two variables by considering two different(More)
1 In natural traffic flow, the information from preceding vehicles determines driver behavior predominantly. 2 With the availability of connected vehicle technologies (CVT), drivers can receive information from both 3 preceding and following vehicles. This creates new opportunities for vehicle coordination and control at 4 the microscopic level based on(More)
A comprehensive literature search on horizon-<lb>tally curved girder bridges up to 1993. AUTHOR: Hall, D. H., Grubb, M. A., and Yoo, C. H.<lb>(1999) TITLE: NCHRP Report 424: Improved Design Speci-<lb>fications for Horizontally Curved Steel Girder<lb>Highway Bridges INFO: Transportation Research Board, National<lb>Research Council, Washington, D.C. ABSTRACT:(More)