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  Partner: UNT Libraries Government Documents Department
 Decade: 2010-2019
Potential connected vehicle applications to enhance mobility, safety, and environmental security

Potential connected vehicle applications to enhance mobility, safety, and environmental security

Date: February 2012
Creator: Balke, Kevin N.; Songchitruksa, Praprut. & Zeng, Xiaosi
Description: "Researchers first conducted a comprehensive review of the state-of-the-art connected-vehicle research and technologies. Once researchers had a thorough understanding of the technology, they focused on selecting and developing the near-term practical applications that use connected vehicle technology. The research team then sought expert opinions from the Texas Transportation Institute working group during two brainstorming sessions, which produced two lists of potential applications and prioritized the applications based on deployment feasibility. In particular, a total of five applications were selected for development of the full concept of operations, including two in safety, two in mobility, and one in environmental security. These applications address various problems, including wrong-way driving and unprotected-grade-crossing crashes (safety): work-zone merge efficiency and safety, and freeway speed harmonization (mobility): and slippery pavement-related crashes (environmental security)."
Contributing Partner: UNT Libraries Government Documents Department
Project report on the continued development and analysis of the Flexible Pavements Database

Project report on the continued development and analysis of the Flexible Pavements Database

Date: February 2011
Creator: Banerjee, Ambarish; Aguiar-Moya, Jose Pablo; Sivaram, Prasad; Smit, Andre de F. & Prozzi, Jorge Alberto
Description: "The efforts of 0-6275 were primarily twofold. One aspect was geared towards extensive performance monitoring and material testing for better characterization of the experimental sections included as part of 0-5513 as well as new sections that were to be incorporated in the enhanced version of the TFPD. The other aspect of the study was to look into the calibration of the transfer functions in the newly developed MEPDG as well as Texas ME Design procedure being sponsored by TXDOT through the 0-5798 research study. It was understood that an effort to determine reliable bias correction factors would necessitate a large volume of project specific information for a number of pavement sections that are well spread out within the state such that differences in materials, traffic, construction practices and climate are captured. The TFPD supplemented by other databases like the DCIS and the LIMS will ensure that the data needs for the calibration exercise are met and fulfilled to the extent possible. When time series data were not available, the researchers utilized relevant data from the FHWA's Long Term Pavement Performance Studies (LTPP). This interim report summarizes the activities performed during the first 7 months of the project, when the current ...
Contributing Partner: UNT Libraries Government Documents Department
Development of an early-stage toll revenue estimation model

Development of an early-stage toll revenue estimation model

Date: May 2012
Creator: Beaty, Curtis. & Lieu, Henry.
Description: This report contains a standalone, spreadsheet-based model that prepares early-stage traffic and toll revenue estimates.
Contributing Partner: UNT Libraries Government Documents Department
Teen driver cell phone blocker

Teen driver cell phone blocker

Date: February 2012
Creator: Benden, Mark; Fink, Rainer & Stafford, James
Description: "In this report a study that was a randomized control intervention that measures the effectiveness of a cellular phone control device that communicates whit the vehicles of teen drivers to deny them access to their phone while driving for the purpose of reducing distraction=related negative driving events."
Contributing Partner: UNT Libraries Government Documents Department
Teen driver cell phone blocker

Teen driver cell phone blocker

Date: February 2012
Creator: Benden, Mark; Fink, Rainer & Stafford, James
Description: "In this report a study that was a randomized control intervention that measures the effectiveness of a cellular phone control device that communicates whit the vehicles of teen drivers to deny them access to their phone while driving for the purpose of reducing distraction=related negative driving events."
Contributing Partner: UNT Libraries Government Documents Department
Natural Outlook, Winter/Spring, 2011

Natural Outlook, Winter/Spring, 2011

Date: 2011
Creator: Berksan, Annette
Description: Newsletter discussing environmental issues and policies in Texas.
Contributing Partner: UNT Libraries Government Documents Department
Fracture properties and fatigue cracking resistance of asphalt binders

Fracture properties and fatigue cracking resistance of asphalt binders

Date: March 2012
Creator: Bhasin, Amit.; Izadi, Anoosha & Motamed, Arash
Description: "The main objective of this study was to evaluate the inherent fatigue cracking resistance of asphalt binders in the form of a matrix with rigid particle inclusions. The underlying rational for this approach was to subject the binders to a state of stress that is similar to the one in a full asphalt mixture."
Contributing Partner: UNT Libraries Government Documents Department
The potential for improving rail international intermodal services in Texas and the Southwest region of the United States

The potential for improving rail international intermodal services in Texas and the Southwest region of the United States

Date: June 2011
Creator: Blaze, James R. & Harrison, Robert
Description: "The report covers a period of great significance for railroading in the U.S as it contains a number of milestones now shaping the future performance of the industry. The specific subject is improving inter-modal service so that it can support state and regional highway planning, now facing severe financial cut-backs as revenue sources become fully committed to bond servicing, user taxes, loose purchasing power and fuel consumption begins to fall."
Contributing Partner: UNT Libraries Government Documents Department
Manual for Assessing Safety Hardware test 3-11 on the Texas T101 bridge rail

Manual for Assessing Safety Hardware test 3-11 on the Texas T101 bridge rail

Date: March 2011
Creator: Bligh, Roger P. & Menges, Wanda L.
Description: The Texas T101 bridge rail is widely used in the state of Texas. Previous testing demonstrated its ability to contain and redirect passenger cars and a 20,000-lb school bus. Based on this testing, the Federal Highway Administration accepted the T101 bridge rail as an NCHRP Report 350 TL-3 barrier. However, its impact performance with pickup trucks was never evaluated. Under research project 0-5526, Impact Performance of Roadside Safety Appurtenances, researchers conducted a performance assessment of Texas roadside safety devices to help evaluate the impact of adopting the new AASHTO Manual for Assessing Safety Hardware (MASH) guidelines on current hardware. Testing and evaluation of the T101 bridge rail was recommended as a high priority. This recommendation was based primarily on the absence of pickup truck testing on the system, and concerns that the 27-inch rail height may not be compatible with pickup trucks and SUVs under design impact conditions. The T101 bridge rail did not meet MASH evaluation criteria for test 3-11. The vehicle overturned after losing contact with the barrier.
Contributing Partner: UNT Libraries Government Documents Department
Development of a MASH TL-2 guardrail-to-bridge rail transition compatible with 31-inch guardrail

Development of a MASH TL-2 guardrail-to-bridge rail transition compatible with 31-inch guardrail

Date: December 2011
Creator: Bligh, Roger P.; Arrington, Dusty R. & Menges, Wanda L.
Description: The TxDOT Design Division is in the process of developing new guardrail standards that comply with the AASHTO Manual for Assessing Safety Hardware (MASH). The new guardrail system will provide increased capacity and improved impact performance relative to the current design. A key feature of the new system is an increased in rail mounting height from 27 inches to 31 inches. TxDOT's current TL-2 metal beam transition is 27 inches tall and is not compatible with the new 31 inch guardrail system. While the high-speed, nested thrie beam transition system meets MASH guidelines and is compatible with a 31-inch guardrail, it would be cost-prohibitive to use it on all roadways. The objective of this research was to develop a transition that is suitable for use on lower speed roadways, less expensive and complex than the current high-speed (i.e., TL-3) transition design, and is compatible with a 31-inch guardrail. A low-cost guardrail-to-bridge rail transition was successfully developed and tested under MASH Test Level 2 conditions. It is compatible with a 31-inch guardrail and can connect to rigid concrete bridge rails. It is considered suitable for implementation on roadways that have traffic conditions appropriate for the use of TL-2 safety hardware. Use ...
Contributing Partner: UNT Libraries Government Documents Department