Physically based model for predicting the susceptibility of asphalt pavements to moisture-induced damage

Physically based model for predicting the susceptibility of asphalt pavements to moisture-induced damage

Date: September 2010
Creator: Masad, Eyad; Graham, Michael A. & Abu Al-Rub, Rashid K.
Description: "This study presents a novel moisture-induced continuum damage model for asphalt concrete."
Contributing Partner: UNT Libraries Government Documents Department
Texas Directory of Traffic Safety Professionals

Texas Directory of Traffic Safety Professionals

Date: August 1997
Creator: Rodriguez, Katherine; Davies, Becky & Seymore, Melody
Description: Book containing a list of Texas traffic safety specialists as of 1997. Includes their positions, contact information, and experience. There are three tabbed indexes that sort these individuals by their area of expertise, by name, and by agency. A final tabbed index includes a list of district safety specialists and a district map of Texas.
Contributing Partner: UNT Libraries Government Documents Department
Landside freight access to airports : findings and case studies

Landside freight access to airports : findings and case studies

Date: August 2010
Creator: Frawley, William E.; Borowiec, Jefferey D.; Protopapa, Annie A.; Morgan, Curtis Alan & Warner, Jeffery E.
Description: "Texas' airports play a large role in the national and regional movement of goods by air. This includes goods moved within the state, across the country, and internationally to several continents. Most of this movement of goods is accomplished at the largest airports in Texas. However, as freight demand grows, a time will come when other airports will need to be utilized to accommodate additional demand. Properly planned transportation infrastructure is critical to ensure the vitality of an airport's freight operations. Time-sensitive air freight requires high levels of operational efficiency, which is generally optimized by taking steps to ensure both freight and passenger roadway access within the airport boundaries. Connections and design features of regional highways near the airports are no less important because they allow access to these important economic generators. This research report identifies the issues, barriers, physical bottlenecks (e.g., infrastructure needs), and solutions (including funding mechanisms) concerning landside access to airports in Texas. Inner city airports in large metropolitan areas sometimes face roadway geometric challenges, but typically have relatively low cargo activity levels. Shipping representatives stated that wayfinding is a key characteristic in providing good landside freight access to airports. Signage needs to be visible and informative ...
Contributing Partner: UNT Libraries Government Documents Department
Transportation planning, policy and climate change: making the long-term connection

Transportation planning, policy and climate change: making the long-term connection

Date: March 2011
Creator: Lindquist, Eric
Description: "This UTCM project develops a greater understanding of decision and policy processes in regard to climate change and adaptation."
Contributing Partner: UNT Libraries Government Documents Department
Non-vital advance rail preemption of signalized intersections near highway-rail grade crossings

Non-vital advance rail preemption of signalized intersections near highway-rail grade crossings

Date: June 2007
Creator: Balke, Kevin N.; Engelbrecht, Roelof Johannes & Ruback, Leonard G.
Description: The Texas Department of Transportation (TxDOT) primarily uses simultaneous preemption of traffic signals near highway-rail grade crossings to clear queued vehicles prior to the arrival of a train at the crossing. At some intersections, 20 seconds of advanced warning may not be sufficient to allow the traffic signal to clear pedestrians using the normal clearance intervals between phases. The research developed an alternative method (non-vital advance preemption) of ensuring adequate pedestrian clearance in the presence of an approaching train without interfering with the normal preemption sequence at the intersection or installing costly additional track circuitry needed to provide advance preemption. Two strategies were investigated to ensure pedestrian clearance time. The first utilizes a lower-level preemption sequence to guarantee full pedestrian clearance to a terminating phase before the traffic signal starts the preemption sequence. The second strategy uses the pedestrian-omit feature to prevent the controller from activating the pedestrian interval if there is not sufficient time in advance of the start of the preemption sequence to provide full pedestrian clearance.
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
The Freight Shuttle System : advancing commercial readiness

The Freight Shuttle System : advancing commercial readiness

Date: November 2010
Creator: Roop, Stephen S.; Ragab, Ayman H.; Olson, Leslie E.; Protopapa, Annie A.; Yager, Michael A.; Morgan, Curtis Alan et al.
Description: This report summarizes the results of research aimed at advancing the commercial readiness of a new hybrid mode of inter-modal freight transportation called the Freight Shuttle System (FSS).
Contributing Partner: UNT Libraries Government Documents Department
Transportation for humanity: meeting the needs in the colonias

Transportation for humanity: meeting the needs in the colonias

Date: September 2010
Creator: Storey, Beverly B. & Jasek, Debbie
Description: "The goal of the research was to access the current transportation challenges facing residents of the colonias and determine the feasibility of vehicle procurement through donations or at-cost purchases from a variety of entities and/or individuals to support the program, and recommendations for alternative funding mechanisms to support the local community centers in their efforts to provide transportation to the colonias population."
Contributing Partner: UNT Libraries Government Documents Department
Work zone positive protection guidelines

Work zone positive protection guidelines

Date: May 2011
Creator: Ullman, Gerald L.; Iragavarapu, Vichika & Sun, Dahzi
Description: "In this report the goal of the project was to develop implementation guidance that the Texas Department of Transportation (TxDOT) can use to make better decisions regarding when and where to use positive protection in work zones and when to consider exposure control and other traffic control measures that could improve work zone safety."
Contributing Partner: UNT Libraries Government Documents Department
Performance measures for metropolitan planning organizations

Performance measures for metropolitan planning organizations

Date: April 2012
Creator: Moore, Devin; Ramni, Tara; Norboge, Nicolas & Turnbull, Katherine
Description: "The aim of this project is to consolidate available knowledge and provide guidance to transportation agencies, specifically MPOs, to help them incorporate performance measurement relating to transportation planning and operations. This research includes a survey of agency practices and agency needs, development of guidance on effective performance measurement and allied issues of strategic planning, goal setting, and data collection."
Contributing Partner: UNT Libraries Government Documents Department
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