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Articles 1 - 6 of 6
Full-Text Articles in Urban Studies and Planning
Development Of A New Piezoelectric-Based Energy Harvesting Pavement System, Lukai Guo
Development Of A New Piezoelectric-Based Energy Harvesting Pavement System, Lukai Guo
USF Tampa Graduate Theses and Dissertations
A novel design of a piezoelectric-based energy harvesting pavement system (PZ-EHPS) is introduced in this dissertation work. The design concept of this PZ-EHPS is to transform asphalt layers into a piezoelectric energy harvester to collect dissipated vehicle kinetic energy in a large-scale system, relying on two conductive asphalt layers and one piezoelectric material layer. To verify the feasibility of the above design concept, this dissertation work practically fabricated and tested a series of PZ-EHPS specimens under the loads from a Material Testing System (MTS) in the laboratory, and theoretically analyzed one typical PZ-EHPS specimen via a three-degree-of-freedom electromechanical model and …
Factors Explaining Changes In Household Vehicle Miles Of Travel, Richard Driscoll
Factors Explaining Changes In Household Vehicle Miles Of Travel, Richard Driscoll
USF Tampa Graduate Theses and Dissertations
Vehicle miles of travel (VMT) is a key indicator of travel demand in the United States. Since 1995 total VMT and VMT per capita has fluctuated, with notable declines in the late 2000s and accelerated increases in the last 7 years. Since 1995, the National Household Travel Survey (NHTS) has tracked the household share of total VMT to shed light on the demographic and behavioral data behind personal vehicle travel. The household share of VMT, while still a majority, has declined every NHTS year since at least 1995. Meanwhile, household VMT has stagnated around 2.25 trillion miles since the 2001 …
Connected Autonomous Vehicles: Capacity Analysis, Trajectory Optimization, And Speed Harmonization, Amir Ghiasi
Connected Autonomous Vehicles: Capacity Analysis, Trajectory Optimization, And Speed Harmonization, Amir Ghiasi
USF Tampa Graduate Theses and Dissertations
Emerging connected and autonomous vehicle technologies (CAV) provide an opportunity to improve highway capacity and reduce adverse impacts of stop-and-go traffic. To realize the potential benefits of CAV technologies, this study provides insightful methodological and managerial tools in microscopic and macroscopic traffic scales. In the macroscopic scale, this dissertation proposes an analytical method to formulate highway capacity for a mixed traffic environment where a portion of vehicles are CAVs and the remaining are human-driven vehicles (HVs). The proposed analytical mixed traffic highway capacity model is based on a Markov chain representation of spatial distribution of heterogeneous and stochastic headways. This …
Heavy Vehicle Classification Analysis Using Length-Based Vehicle Count And Speed Data, Eren Yuksel
Heavy Vehicle Classification Analysis Using Length-Based Vehicle Count And Speed Data, Eren Yuksel
USF Tampa Graduate Theses and Dissertations
There is an increasing demand for application of Intelligent Transportation Systems (ITS) in order to make highways safer and sustainable. Collecting and analyzing traffic stream data are the most important parameters in transportation engineering in enhancing our understanding of traffic congestion and mobility. Classification of the vehicles using traffic data is one of the most essential parameters for traffic management. Of particular interest are heavy vehicles which impact traffic mobility due to their lack of maneuverability and slower speeds. The impact of heavy vehicles on the traffic stream results in congestion and reduction of road efficiency. In this paper, length-based …
Understanding The Effects Of Demographic And Socio-Economic Factors On Public Transit Ridership Trends, Kurt Lehmann
Understanding The Effects Of Demographic And Socio-Economic Factors On Public Transit Ridership Trends, Kurt Lehmann
USF Tampa Graduate Theses and Dissertations
Public transit, an important mobility service for many, has incurred ridership decline in the U.S. for the past three years. In 2014, U.S. transit ridership was 10.74 billion unlinked passenger trips. In 2015, total ridership was 1.0 percent fewer, and the 2016 decrease was 2.2 percent from 2015. The consistent abandonment of transit in the U.S. does not seem to be ending. In 2017, ridership predicted from year-to-date data is 2.4 percent less than 2016. Furthermore, per capita ridership has decreased 17 percent since 1980. Both the short-term ridership trend and long-term per capita ridership trend is concerning given the …
Performance Evaluation Of Choice Set Generation Algorithms For Modeling Truck Route Choice: Insights From Large Streams Of Truck-Gps Data, Divyakant Tahlyan
Performance Evaluation Of Choice Set Generation Algorithms For Modeling Truck Route Choice: Insights From Large Streams Of Truck-Gps Data, Divyakant Tahlyan
USF Tampa Graduate Theses and Dissertations
This thesis evaluates truck route choice set generation algorithms and derives guidance on using the algorithms for effective generation of choice sets for modeling truck route choice. Specifically, route choice sets generated from a breadth first search link elimination (BFS-LE) algorithm are evaluated against observed truck routes derived from large streams of GPS traces of a sizeable truck fleet in the Tampa Bay region of Florida. A systematic evaluation approach is presented to arrive at an appropriate combination of spatial aggregation and minimum number of trips to be observed between each origin-destination (OD) location for evaluating algorithm-generated choice sets. The …