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Now showing items 1631-1640 of 1668
Operational Analysis of Alternative Intersections
(Virginia Tech, 2015-09-09)
Alternative intersections and interchanges, such as the diverging diamond interchange (DDI), the restricted crossing u-turn (RCUT), and the displaced left-turn intersection (DLT), have the potential to both improve safety ...
Accounting for Risk and Level of Service in the Design of Passing Sight Distances
(Virginia Tech, 2005-11-28)
Current design methods in transportation engineering do not simultaneously address the levels of risk and service associated with the design and use of various highway geometric elements. Passing sight distance (PSD) is ...
Simulation of Crash Prevention Technology at a No- Passing Zone site
(Virginia Tech, 2003-12-16)
No-passing zone crashes constitute a sizable percentage of the total crashes on two-lane rural roads. A detection and warning system has been devised and implemented at a no-passing zone site on route 114 of Southwest ...
Development of a Microscopic Emission Modeling Framework for On-Road Vehicles
(Virginia Tech, 2017-04-27)
The transportation sector has a significant impact on the environment both nationally and globally since it is a major vehicle fuel consumption and emissions contributor. These emissions are considered a major environmental ...
Do Roundabouts Work? An Evaluation for Uniform Approach Demands
(Virginia Tech, 2011-08-01)
With the increased prevalence of roundabouts in the United States, there is a need to evaluate the performance of roundabouts relative to other intersection control strategies. Few studies have compared roundabouts with ...
Statistical and Behavioral Modeling of Driver Behavior on Signalized Intersection Approaches
(Virginia Tech, 2010-12-08)
The onset of a yellow indication is typically associated with the risk of vehicle crashes resulting from dilemma-zone and red-light-running problems. Such risk of vehicle crashes is greater for high-speed signalized ...
Evaluation and Development of a University Visitor Parking Management Framework
(Virginia Tech, 2009-11-16)
The main campus of Virginia Polytechnic Institute and State University (Virginia Tech) has a current parking inventory of approximately 14,310 parking spaces in 88 surface lots. Of the available parking spaces 92% are ...
Development of a methodology to interface transportation planning and traffic simulation
(Virginia Tech, 1993)
The purpose of this research is to develop a methodology to interface transportation planning and traffic simulation. Differences in representations of planning and traffic networks prohibits planners and engineers from ...
Optimization of the bottom plate of a ground-supported liquid storage tank
(Virginia Tech, 1992)
Several tanks have failed due to intolerable differential settlements, causing major problems in most cases. The objective of this study is to optimize the bottom plate of the tank so that the differential settlements are ...
The economic justification and operational requirements of high-speed runway exits
(Virginia Tech, 1992)
The objective of this thesis is to analyze the operational requirements of aircraft during the runway exiting maneuvers and the economic feasibility of high-speed runway exits. The motion of the aircraft is simulated by a ...