Rural planning organizations, their role in transportation planning and project development in Texas :  technical report (open access)

Rural planning organizations, their role in transportation planning and project development in Texas : technical report

Report containing research identifying and examining rural planning organizations, their structure and operation, and their role in transportation planning and programming.
Date: October 2010
Creator: Overman, John H.; Ellis, Patricia; Frawley, William; Taylor, Ryan; Geiselbrecht, Tina & Goodin, Ginger
Object Type: Report
System: The Portal to Texas History
Development of a MASH TL-3 median barrier gate (open access)

Development of a MASH TL-3 median barrier gate

Report regarding a median barrier gate designed to both offer protection to motorists and easier cross-median access for emergency and maintenance vehicles.
Date: February 2011
Creator: Bligh, Roger P.; Arrington, Dusty R.; Sheikh, Nauman Mansoor; Silvestri, Chiara & Menges, Wanda L.
Object Type: Report
System: The Portal to Texas History
Benefits of Public Roadside Safety Rest Areas in Texas :  technical report (open access)

Benefits of Public Roadside Safety Rest Areas in Texas : technical report

Report regarding efforts to develop a benefit-cost analysis methodology for safety rest areas in Texas and to demonstrate its application in select corridors throughout the state. This project also considers approaches to developing rest areas that could reduce costs to the public.
Date: May 2011
Creator: Carson, Jodi L.; Pezoldt, Val J.; Koncz, Nicholas A., 1964- & Obeng-Boampong, Kwaku Oduro, 1977-
Object Type: Report
System: The Portal to Texas History
Rapid Field Detection of Sulfate and Organic Content in Soils: Technical Report (open access)

Rapid Field Detection of Sulfate and Organic Content in Soils: Technical Report

Report regarding efforts to identify a technique to map the sulfate content of soil over a large area to a depth of 3 to 4 feet. Two devices are noted: an electromagnetic device called EM-38 and a soil conductivity device called VERIS 315.
Date: October 2010
Creator: Harvey, Omar; Sebesta, Stephen & Harris, Pat
Object Type: Report
System: The Portal to Texas History
The Overlay Tester : A Sensitivity Study to Improve Repeatability and Minimize Variability in the Test Results (open access)

The Overlay Tester : A Sensitivity Study to Improve Repeatability and Minimize Variability in the Test Results

"This report presents a comprehensive sensitivity evaluation of the critical steps of the Overlay Tester (OT) test procedure in an attempt to optimize the OT repeatability and minimize variability in the test results."
Date: February 2012
Creator: Walubita, Lubinda F.; Faruk, Abu N.; Das, Gautam; Tanvir, Hossain A.; Zhang, Jun & Scullion, Tom
Object Type: Report
System: The Portal to Texas History
Comprehensive evaluation of compaction of asphalt pavements and development of compaction monitoring system (open access)

Comprehensive evaluation of compaction of asphalt pavements and development of compaction monitoring system

"This report aimed to conduct a comprehensive evaluation of compaction of asphalt pavements and develop software for monitoring field compaction in real time.The results were used to determine the effects of compaction temperature, compaction method, mixture design, and base type on the compactability of asphalt mixtures.Also in this report researchers developed a system for monitoring and documenting the compaction process of asphalt mixtures called compaction monitoring system (CMS)."
Date: April 2012
Creator: Kassem, Emad Abdel-Rahman, 1979-; Scullion, Tom; Masad, Eyad; Chowdhury, Arif; Liu, Wenting; Estakhri, Cindy K. et al.
Object Type: Report
System: The Portal to Texas History
Subbase and Subgrade Performance Investigation and Design Guidelines for Concrete Pavement (open access)

Subbase and Subgrade Performance Investigation and Design Guidelines for Concrete Pavement

Report regarding research into cheaper alternatives for the construction of pavement subbases that maintains adequate pavement performance.
Date: March 2012
Creator: Jung, Youn su; Zollinger, Dan G.; Cho, Byoung Hooi; Won, Mooncheol & Wimsatt, Andrew James, 1964-
Object Type: Report
System: The Portal to Texas History
Performance monitoring pavements with thermal segregation in Texas (open access)

Performance monitoring pavements with thermal segregation in Texas

This report investigated the performance of asphalt surface mixtures that exhibited thermal segregation during construction from 2004 to 2009. The results do not show that thermally segregated locations will fail within three to seven years but they do show that instances of thermal segregation may continue to be anomalous locations in the layer that could lead to failures in the pavement structure.
Date: April 2012
Creator: Sebesta, Stephen & Scullion, Tom
Object Type: Report
System: The Portal to Texas History
Effects of bending and heat on the ductility and fracture toughness of flange plate (open access)

Effects of bending and heat on the ductility and fracture toughness of flange plate

"This report documents the findings of the Texas Department of Transportation (TxDOT)sponsored research project that investigated the possible causes of the cracking and developed recommendations to prevent the occurrence of such cracking."
Date: May 2012
Creator: Keating, Peter B. & Christian, Lee C.
Object Type: Report
System: The Portal to Texas History
Development of guidelines for triple left and dual right-turn lanes :  technical report (open access)

Development of guidelines for triple left and dual right-turn lanes : technical report

Report regarding the development of geometric and signal design guidelines for triple left-turn lanes and dual right-turn lanes and then evaluatues the safety of such sites in Texas.
Date: July 2011
Creator: Cooner, Scott A.; Ranft, Stephen E.; Rathod, Yatin K.; Qi, Yi; Yu, Lei; Wang, Yubian et al.
Object Type: Report
System: The Portal to Texas History
Synthesis and Study of the Roadside Vegetation Establishment Process (open access)

Synthesis and Study of the Roadside Vegetation Establishment Process

"In this report the researchers try to provide a more diverse set of tools and options for Texas Department of Transportation (TxDOT) personnel that will help ensure timely vegetation establishment to meet Texas Pollutant Discharge Elimination System (TPDES) regulatory requirements, minimize project delays, and help reduce long-term costs in vegetation development and management."
Date: May 2011
Creator: Storey, Beverly J.; Schutt, James R.; McFalls, Jett A.; Jones, Kim D.; Garza, Abel P.; Gaus, Teresa A. et al.
Object Type: Report
System: The Portal to Texas History
White Paper:  State of ITS Industry and Assessment of Project Types (open access)

White Paper: State of ITS Industry and Assessment of Project Types

"This report describes the state of the intelligent transportation system (ITS) industry and provides a reference for use in soliciting ITS strategic plan inputs from stakeholders in Texas."
Date: November 2011
Creator: Seymour, Edward J. (Edward James), 1951-; Chaudhary, Nadeem; Middleton, Dan; Brydia, Robert & Miller, Kristine
Object Type: Paper
System: The Portal to Texas History
Traffic signal operations handbook workshop series :  final report (open access)

Traffic signal operations handbook workshop series : final report

Report documenting the development and conduct of a two-year series of workshops to share information with Texas Department of Transportation (TxDOT) engineers and technicians regarding the cost-effective design and operation of traffic signals at intersections along state highways in Texas.
Date: September 2011
Creator: Pratt, Michael P. & Bonneson, James A.
Object Type: Report
System: The Portal to Texas History
Performance Measures for Public Transit Mobility Management (open access)

Performance Measures for Public Transit Mobility Management

Report that looks at the state of mobility management practice throughout Texas, as well as national best practices in mobility management. Additionally, this research provides an overview of the varying roles of state departments of transportation in public transit mobility management efforts. The research also presents applied mobility management for agencies seeking to implement mobility management programs as well as a menu of performance measures that can be utilized based on the type and level of program implemented.
Date: December 2011
Creator: Sen, Lalita; Majumdar, Sarmistha R.; Highsmith, Meredith; Cherrington, Linda K. & Gilliland, Cynthia A. Weatherby
Object Type: Report
System: The Portal to Texas History
TxDOT uses of real-time commercial traffic data :  opportunity matrix (open access)

TxDOT uses of real-time commercial traffic data : opportunity matrix

Based on a TxDOT survey, a review of other state DOTs, and researcher understanding of Intelligent Transportation System (ITS) needs, the Texas Transportation Institute (TTI) team developed a comprehensive list of opportunities for TxDOT to consider pertaining to future use of private sector (PS) data. Specific opportunities for applying private data were reviewed in light of accuracy of the data, coverage areas, data availability, cost, and control of the data stream.
Date: January 2012
Creator: Middleton, Dan; Brydia, Robert; Kraus, Edgar; Cheu, Kelvin; Rajbhandari, Rajat, 1973-; Songchitruksa, Praprut et al.
Object Type: Report
System: The Portal to Texas History
Development of a MASH TL-2 guardrail-to-bridge rail transition compatible with 31-inch guardrail (open access)

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

Report discussing the development of a transition roadway rail that is suitable on lower-speed roadways and that is suitable for implementation.
Date: December 2011
Creator: Bligh, Roger P.; Arrington, Dusty R. & Menges, Wanda L.
Object Type: Report
System: The Portal to Texas History
Energy Developments and the Transportation Infrastructure in Texas: Impacts and Strategies (open access)

Energy Developments and the Transportation Infrastructure in Texas: Impacts and Strategies

"This report describes the work completed to measure the impact of increased level of energy-related activities on the Texas Department of Transportation (TxDOT) right-of-way and infrastructure, as well as develop recommendations to reduce and manage TxDOT's exposure and risk resulting from those activities."
Date: March 2012
Creator: Quiroga, César A.; Fernando, E. G. & Oh, Jeongho
Object Type: Report
System: The Portal to Texas History
Texas M-E flexible pavement design system : literature review and proposed framework (open access)

Texas M-E flexible pavement design system : literature review and proposed framework

"This report discusses the framework proposed for the Texas Mechanistic-Empirical (TxME) flexible pavement design system, including pavement structure, material properties, traffic, climate, design reliability, and user interfaces."
Date: April 2012
Creator: Hu, Sheng; Zhou, Fujie & Scullion, Tom
Object Type: Report
System: The Portal to Texas History
High RAP mixes design methodology with balanced performance (open access)

High RAP mixes design methodology with balanced performance

"This report presents a comprehensive study focusing on methodologies to improve the performance of high reclaimed asphalt pavement (RAP) content mixes."
Date: August 2011
Creator: Zhou, Fujie; Hu, Sheng; Das, Gautam & Scullion, Tom
Object Type: Report
System: The Portal to Texas History
Research on asset management for safety and operations (open access)

Research on asset management for safety and operations

"This report provided Texas Department of Transportation (TxDOT) with guidance on developing a well-designed asset management system as a critical component of the agency's approach to providing for the mobility of its customers, preserving the infrastructure already in place, planning for future improvements of that infrastructure, and being responsive and accountable to the public regarding the investment of their tax dollars."
Date: August 2011
Creator: Jasek, Debbie; Carson, Jodi L.; Theiss, LuAnn; Songchitruksa, Praprut; Perkins, Judy; Yang, Yonggao et al.
Object Type: Report
System: The Portal to Texas History
Signing strategies for low-water and flood-prone highway crossings (open access)

Signing strategies for low-water and flood-prone highway crossings

"In this report the Texas Transportation Institute (TTI) developed a guidelines and recommendations for creating signing uniformity for low-water and flood-prone sections of roadways. TTI also developed criteria for when to implement active water-level detection and advance warning systems at low-water crossings and flood-prone roadway sections."
Date: November 2011
Creator: Higgins, Laura; Chrysler, Susan T.; Pesti, Geza & Chaudhary, Nadeem
Object Type: Report
System: The Portal to Texas History
A portable toolbox to monitor and evaluate signal operations (open access)

A portable toolbox to monitor and evaluate signal operations

Report regarding a portable computer that interfaces with traffic signal cabinets, monitors and logs events that occur within the cabinet, and then analyzes the log files and creates easy to read reports.
Date: September 2011
Creator: Sunkari, Srinivasa R.; Charara, Hassan A. & Songchitruksa, Praprut
Object Type: Report
System: The Portal to Texas History
Work zone positive protection guidelines (open access)

Work zone positive protection guidelines

"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
Object Type: Report
System: The Portal to Texas History
Evaluation and development of pavement scores, performance models and needs estimates :  phase I activities (open access)

Evaluation and development of pavement scores, performance models and needs estimates : phase I activities

Report that documents the results of two completed tasks for the "Evaluation and Development of Pavement Scores, Performance Models and Needs Estimates" project.
Date: June 2011
Creator: Gharaibeh, Nasir G. (Nasir Ghaleb), 1967-; Freeman, Thomas J.; Wimsatt, Andrew James, 1964- & Zou, Yajie
Object Type: Report
System: The Portal to Texas History