Predicting the incremental effects on transit ridership due to Bus-On-Shoulder operations

Predicting the incremental effects on transit ridership due to Bus-On-Shoulder operations

Date: August 2010
Creator: Machemehl, Randy B. & Pappas, Elani
Description: "Bus-On-Shoulder (BOS) operations are an extremely effective method for increasing the quality of a bus service; allowing for a bus to use a freeway shoulder as a bypass lane not only decreases bus travel time but also increases the bus service's overall performance. BOS has also been found to increase bus ridership. The modern BOS system began in the Minneapolis-Saint Paul area almost 20 years ago. Using the extensive data available from Minneapolis-Saint Paul, ridership changes due to BOS operations were explored. The data showed that with 90% confidence, ridership will increase by at least 4.5% and as much as 14.3%. This paper also explores how the citizens of Austin, Texas would respond to a BOS operation on local freeways. A stated preference survey was administered to a sample of Austin commuters. It was determined that potential riders would desire a time savings of 7 or more minutes. Typically it is challenging for persons to accurately predict time savings, therefore it was concluded that for a BOS operation to be successful it was necessary for a there to be a perceived time savings."
Contributing Partner: UNT Libraries Government Documents Department
Use of Micro Unmanned Aerial Vehicles for roadside condition assessment

Use of Micro Unmanned Aerial Vehicles for roadside condition assessment

Date: December 2010
Creator: Gharaibeh, Nasir G. & Hart, William Scott
Description: "Micro Unmanned Aerial Vehicles (MUAVs) that are equipped with digital imaging systems and global positioning systems provide a potential opportunity for improving the effectiveness and safety of roadside condition and inventory surveys. This study provides an assessment of the effectiveness of MUAVs as a tool for collecting condition data for roadside infrastructure assets using three field experiments."
Contributing Partner: UNT Libraries Government Documents Department
A road pricing methodology for infrastructure cost recovery

A road pricing methodology for infrastructure cost recovery

Date: August 2010
Creator: Walton, C. Michael & Conway, Alison J.
Description: "The purpose of this research is to provide a theoretical framework for future commercial vehicle user-changing using real-time vehicle weight and configuration information collected using weigh-in-motion (WIM) systems."
Contributing Partner: UNT Libraries Government Documents Department
Texas Urban Triangle: creating a spatial decision support system for mobility policy and investments that shape the sustainable growth of Texas

Texas Urban Triangle: creating a spatial decision support system for mobility policy and investments that shape the sustainable growth of Texas

Date: November 2010
Creator: Bright, Elise M.; Morgan, Curtis Alan & Neuman, Michael
Description: "This project came into being due to the dramatic transformation of the four core Texas metropolitan areas into an emergent megalopolis: Dallas-Fort Worth, Houston, San Antonio, and Austin. Its aims are two-fold: to provide a framework for decisions about future growth in the fastest growing region of Texas, and to spur further research into the complexities of this vast and rapidly emerging mega-region. The Texas Urban Triangle - 17 million persons spread over 58,000 square miles - is a new urban phenomenon, a triangular megalopolis whose development is not linear and contiguous. This report gives policy makers and investors from all sectors of society the critical knowledge they need to make decisions that will shape the future of Texas. The Texas Urban Triangle is one of the most dynamic urban regions in the nation, and to ensure it continues to flourish, we must build a future based on sustainable growth principles. Our preliminary findings suggest that this is not always the case. Further research needs to be conducted to obtain a complete, detailed, and comprehensive portrait. Nonetheless, even these preliminary findings are robust and point to more sustainable options for the future. Now that this preliminary analysis has been completed, ...
Contributing Partner: UNT Libraries Government Documents Department
The light-duty-vehicle fleet's evolution: anticipating Plug-In-Electric-Vehicle adoption and greenhouse gas emissions across the U.S. fleet

The light-duty-vehicle fleet's evolution: anticipating Plug-In-Electric-Vehicle adoption and greenhouse gas emissions across the U.S. fleet

Date: May 2011
Creator: Kockelman, Kara; Musti, Sashank & Paul, Binny
Description: "The first part of this report relies on stated and revealed preference survey results across a sample of U.S. households to first ascertain vehicle acquisition, disposal, and use patterns, and then simulate these for a synthetic population over time. The second part of this report relies on data from the U.S. Consumer Expenditure Survey (CEX) to estimate the welfare impacts of carbon taxes and household-level capping of emission (with carbon-credit trading allowed)."
Contributing Partner: UNT Libraries Government Documents Department
Compendium of student papers:  2010 undergraduate transportation scholars program

Compendium of student papers: 2010 undergraduate transportation scholars program

Date: June 2011
Creator: Hawkins, H. Gene; Almy, Isaac; Ballard, Lance; Brimley, Bradford; Huff, William; Larson, Gregory et al.
Description: "This report is a compilation of research papers written by students participating in the 2010 Undergraduate Transportation Scholars Program. The 10-week summer program, now in its 20th year, provides undergraduate students in Civil Engineering the opportunity to learn about transportation engineering through participating in sponsored transportation research projects. The program design allows students to interact directly with a Texas A&M University faculty member or Texas Transportation Institute researcher in developing a research proposal, conducting valid research, and documenting the research results through oral presentations and research papers. The papers in this compendium report on the following topics, respectively: 1) estimating carriers/truckers value of time due to congestion; 2) evaluating retroreflectivity measurement techniques for profiled and rumble stripe pavement markings; 3) analyzing retroreflectivity and color degradation in sign sheeting; 4) evaluating the effectiveness of LED enhanced stop paddles for school crossing guard use; 5) incorporating freight value into the Urban Mobility Report; 6) evaluating ASTM Standard Test Method E2177, retroreflectivity of pavement markings in a condition of wetness; 7) calibrating pavement performance prediction models; and 8) evaluating the effects of concrete curing compounds on hydration."
Contributing Partner: UNT Libraries Government Documents Department
Managed lane travelers: do they pay for travel as they claimed they would?

Managed lane travelers: do they pay for travel as they claimed they would?

Date: May 2011
Creator: Devarasetty, Prem Chand; Shaw, W. Douglass & Burris, Mark
Description: "This study examined if travelers are paying for travel on managed lanes (MLs) as they indicated that they would in a 2008 survey. To achieve the objectives, an Internet-based stated preferences (SP) survey of Houston's Katy Freeway travelers was conducted in 2010. Three survey design methodologies-Db-efficent, random level generation, and adaptive random-were tested in this survey."
Contributing Partner: UNT Libraries Government Documents Department
Designing Fine Aggregate Mixtures to evaluate fatigue crack growth in asphalt mixtures

Designing Fine Aggregate Mixtures to evaluate fatigue crack growth in asphalt mixtures

Date: April 2001
Creator: Bhasin, Amit; Motamed, Arash & Izadi, Anoosha
Description: "Fatigue cracking is a significant form of pavement distress in flexible pavements. The properties of the sand-asphalt mortars or fine aggregate matrix (FAM) can be used to characterize the evolution of fatigue crack growth and self-healing in asphalt mixtures. This study compares the internal microstructure of the mortar within a full asphalt mixture to the internal microstructure of the FAM specimen. This study also conducts a limited evaluation of the influence of mixture properties and methods of compaction on the engineering properties of the FAM specimens. The results from this study, although limited in number, indicate that in most cases the SGC compacted FAM specimen had a microstructure that most closely resembled the microstructure of the mortar within a full asphalt mixture. Another finding from this study was that, at a given level of damage, the healing characteristic of the three different types of FAM mixes was not significantly different. This indicates that the healing rate is mostly dictated by the type of binder and not significantly influenced by the gradation or binder content, as long as the volumetric distribution of the mastic was the same. In other words, the inherent healing characteristics of the asphalt binder play a more ...
Contributing Partner: UNT Libraries Government Documents Department
Thinking critically about models used to predict emergency evacuation in Gulf Coast states

Thinking critically about models used to predict emergency evacuation in Gulf Coast states

Date: July 2010
Creator: Moseley, Brandon; Wynn, Garlin & Lewis, Carol Abel
Description: "This work examines the application of these models in Gulf Coast states and discusses future direction for improving their use by government officials."
Contributing Partner: UNT Libraries Government Documents Department
Predicting the market potential of plug-in electric vehicles using multiday Global Positioning System data

Predicting the market potential of plug-in electric vehicles using multiday Global Positioning System data

Date: December 2011
Creator: Kockelman, Kara & Khan, Mobashwir
Description: "Detailed GPS data for a year's worth of travel by 255 households from the Seattle area were used to investigate how plug-in electric vehicle types may affect adoption rates and use levels."
Contributing Partner: UNT Libraries Government Documents Department
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