Search Results

Landside freight access to airports : findings and case studies

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 in advance of necessary turns or lane changes. Efforts need to be taken to minimize comingling of freight and passenger traffic in areas near the passenger terminals. A variety of funding opportunities exist through public, private, and shared sources to improve access to airports."
Date: August 2010
Creator: Frawley, William E.; Borowiec, Jefferey D.; Protopapa, Annie A.; Morgan, Curtis Alan & Warner, Jeffery E.
Partner: UNT Libraries Government Documents Department

Structural Assessment of "D" Regions Affected by Premature Concrete Deterioration: Technical Report

Description: This report investigates the effects of ASR/DEF on the D-regions of structures by means of a dual experimental and analytical modeling program.
Date: November 2012
Creator: Mander, John B.; Bracci, Hoseph M.; Hurlebaus, Stefan; Grasley, Zachary; Karthik, Madhu M.; Liu, Shih-Hsiang et al.
Partner: UNT Libraries Government Documents Department

Texas Directory of Traffic Safety Professionals

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.
Date: August 1997
Creator: Rodriguez, Katherine; Davies, Becky & Seymore, Melody
Partner: UNT Libraries Government Documents Department

Comparing Perceptions and Measures of Congestion

Description: This report attempts to connect the relationship between perceived congestion as determined by IBM's Commuter Pain Survey results and measured congestion from the Urban Mobility Report (UMR) in 10 cities across the United States.
Date: October 2012
Creator: Le, Minh; Turner, Shawn; Wikander, John & Poe, Chris
Partner: UNT Libraries Government Documents Department

Impact of LRFD Specifications on Design of Texas Bridges: Volume 2: Prestressed Concrete Bridge Girder Design Examples

Description: This is a two-volume report that documents the findings of a TxDOT-sponsored research project to evaluate the impact of the Load and Resistance Factor (LRFD) Specifications on the design of typical Texas bridges as compared to the Standard Specifications.
Date: May 2006
Creator: Hueste, Mary Beth D.; Adil, Mahammed Safi Uddin; Adnan, Mohsin & Keating, Peter B.
Partner: UNT Libraries Government Documents Department

Impact of LRFD Specificaitons on Design of Texas Bridges: Volume 1: Parametric Study

Description: This is a two-volume report that documents the findings of a TxDOT-sponsored research project to evaluate the impact of the Load and Resistance Factor (LRFD) Specifications on the design of typical Texas bridges as compared to the Standard Specifications.
Date: September 2006
Creator: Hueste, Mary Beth D.; Adil, Mahammed Safi Uddin; Adnan, Mohsin & Keating, Peter B.
Partner: UNT Libraries Government Documents Department

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

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.
Date: June 2007
Creator: Balke, Kevin N.; Engelbrecht, Roelof Johannes & Ruback, Leonard G.
Partner: UNT Libraries Government Documents Department

The Freight Shuttle System : advancing commercial readiness

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).
Date: November 2010
Creator: Roop, Stephen S.; Ragab, Ayman H.; Olson, Leslie E.; Protopapa, Annie A.; Yager, Michael A.; Morgan, Curtis Alan et al.
Partner: UNT Libraries Government Documents Department

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

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."
Date: May 2011
Creator: Devarasetty, Prem Chand; Shaw, W. Douglass & Burris, Mark
Partner: UNT Libraries Government Documents Department

Transportation for humanity: meeting the needs in the colonias

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."
Date: September 2010
Creator: Storey, Beverly B. & Jasek, Debbie
Partner: UNT Libraries Government Documents Department

Work zone positive protection guidelines

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."
Date: May 2011
Creator: Ullman, Gerald L.; Iragavarapu, Vichika & Sun, Dahzi
Partner: UNT Libraries Government Documents Department

Performance measures for metropolitan planning organizations

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."
Date: April 2012
Creator: Moore, Devin; Ramni, Tara; Norboge, Nicolas & Turnbull, Katherine
Partner: UNT Libraries Government Documents Department

Nanotechnology-Based System for Damage-Resistant Concrete Pavements

Description: This report's focus was to explore the use of nanotechnology-based nanofilaments, such as carbon nanotubes (CNTs) and nanofibers (CNFs), as reinforcement for improving the mechanical properties of Portland cement paste and creating multifunctional and sensing concrete. (p. 1).
Date: August 2012
Creator: Abu Al-Rub, Rashid K.
Partner: UNT Libraries Government Documents Department

Comparison Between Vehicular Emissions from Real-World In-Use Testing and EPA MOVES Estimation

Description: This research study developed a methodology to perform mandatory dynamometer vehicular emissions tests on real roads, performed on-road emissions tests, and compared the test results to the estimates using the current EPA emissions estimation model.
Date: July 2012
Creator: Lee, Doh-Won; Johnson, Jeremy; Lv, Jinpeng; Novak, Kristen & Zietsman, Josias
Partner: UNT Libraries Government Documents Department