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Full-Text Articles in Engineering
An Artificial Neural Network Model For Predicting Freeway Work Zone Delays With Big Data, Bo Du
An Artificial Neural Network Model For Predicting Freeway Work Zone Delays With Big Data, Bo Du
Dissertations
Lane closures due to road reconstruction and maintenance have resulted in a major source of non-recurring congestion on freeways. It is extremely important to accurately quantify the associated mobility impact so that a cost-effective work zone schedule and an efficient traffic management plan can be developed. Therefore, the development of a sound model for predicting delays or road users is desirable.
A comprehensive literature review on existing work zone delay prediction models (i.e., deterministic queuing model and shock wave model) is conducted in this study, which explores the advantages, disadvantages, and limitations of different modeling approaches. The performance of those …
Optimized Scheduling Of Highway Work Zones, Yimin Tang
Optimized Scheduling Of Highway Work Zones, Yimin Tang
Dissertations
Highway maintenance activities usually require lane closures and disrupt traffic operations. Because of budget constraints, project deadlines, and the resulting traffic impact, the objective of this dissertation is to improve the efficiencies of traffic operation and maintenance work, and minimize the total project cost (i.e., agency cost and road user cost) by optimizing work zone schedules.
This dissertation focuses on the maintenance projects on multiple-lane highways. The objective total cost function is formulated while considering a discrete maintenance time-cost function and time-dependent traffic diversions. However, the work zone scheduling problem is a combinatorial optimization problem and difficult to solve analytically. …
Analysis Of Truck Delays At Container Terminal Security Inspection Stations, Dae-Gwun Yoon
Analysis Of Truck Delays At Container Terminal Security Inspection Stations, Dae-Gwun Yoon
Dissertations
After September 11, 2001, special attention has been given to the vulnerability at container transportation to terrorist activities. United States Customs and Border Protection (CBP) has set up inspection stations for containers at seaport terminals to screen containers, but this practice affects the truck turnaround time in the seaport by generating additional processing delays.
This dissertation analyses the additional truck turnaround time incurred at the inspection stations under various levels of security. Queuing models were used to estimate truck delay as containers are inspected at two successive security inspection stages. Each stage may utilize one or more inspection equipment. The …
Analytical Model For Staging Emergency Evacuations, Vivek V. Korikanthimath
Analytical Model For Staging Emergency Evacuations, Vivek V. Korikanthimath
Dissertations
Disaster response in areas of high population density is centered on the efficient evacuation of people and possibly goods. Developing evacuation plans suitable for different levels of urgency based on the intensity of threat is a challenging task. In case of densely populated cities (e.g., New York, Los Angeles), the level of threat is enhanced by the congestion of their transportation systems, and the decision to evacuate a region simultaneously or by dividing it into multiple stages (or zones) affects the required evacuation time and associated delays.
The evolution of the traffic conditions on the evacuation route can vary significantly …