Accommodating oversize and overweight loads: technical report (open access)

Accommodating oversize and overweight loads: technical report

"In this report the research project resulted in a statewide map recommending primary and alternate Oversize/ overweight (OS/OW)route networks for the most common origins and destinations based on historical Motor Carrier Division data. Keeping strategic routes open for OS/OW loads and minimizing the number of reroutes along the way will reduce the impedance and unknowns in this critical segment of the motor carrier industry."
Date: July 2012
Creator: Middleton, Daniel R.; Li, Yingfeng; Le, Jerry & Koncz, Nicholas
System: The Portal to Texas History
Alternative methods for developing external travel survey data (open access)

Alternative methods for developing external travel survey data

Report on research examining alternative methods for collecting data on external travel movements and evaluating the potential for synthesizing/modeling external travel in lieu of conducting external surveys. The report also provides recommendations to the Texas Department of Transportation on the most viable methods to estimate external travel movements for use in travel demand models in urban areas in Texas.
Date: October 2010
Creator: Farnsworth, Stephen; Talbot, Eric; Songchitruksa, Praprut; Reeder, Phillip & Pearson, David
System: The Portal to Texas History
Alternative Methods of Flexible Base Compaction Acceptance (open access)

Alternative Methods of Flexible Base Compaction Acceptance

"This report summarizes the concerns expressed with the current Texas Department of Transportation(TxDOT) methods, presents approaches some TxDOT districts have taken to overcome problems, and summarizes the current status of other agencies' efforts at mechanistic based acceptance for flexible base. Also this report presents results and findings from a full-scale compaction experiment."
Date: May 2012
Creator: Sebesta, Stephen; Taylor, Ross & Frazier, James
System: The Portal to Texas History
Applying the Systems Engineering Approach to Video Over IP Projects (open access)

Applying the Systems Engineering Approach to Video Over IP Projects

Abstract: In 2009, the Texas Transportation Institute produced for the Texas Department of Transportation a document called Video over IP Design Guidebook. This report summarized an implementation of that project in the form of a workshop. The workshop was developed and presented as a pilot in Austin in 2010 and taught an additional four times in 2011 in Fort Worth, Lubbock, Houston, and San Antonio.
Date: December 2011
Creator: Thomas, Gary B.
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-
System: The Portal to Texas History
Characterization of Exhaust Emissions From Heavy-Duty Diesel Vehicles in the Houston-Galveston-Brazoria Area (open access)

Characterization of Exhaust Emissions From Heavy-Duty Diesel Vehicles in the Houston-Galveston-Brazoria Area

"For this study, a total of 30 heavy-duty diesel vehicles (HDDVs) were selected from City of Houston (COH) fleet based on opacity testing for HEs and random selection for non-HEs. With the selected 30 vehicles, driving and idling emission testing were performed to characterize their emissions with respect to vehicle classes, types (HE or non-HE), and model years."
Date: October 2011
Creator: Johnson, Jeremy D.; Lee, Doh-Won; Farzaneh, Reza; Zietsman, Josias & Yu, Lei
System: The Portal to Texas History
Collision Loads on Bridge Piers: Phase 2. Report of Guidelines for Designing Bridge Piers and Abutments for Vehicle Collisions (open access)

Collision Loads on Bridge Piers: Phase 2. Report of Guidelines for Designing Bridge Piers and Abutments for Vehicle Collisions

"An instrumented, simulated bridge pier was constructed, and two full-scale collisions with an 80,000-lb van-type tractor-trailer were performed on it. The trailer was ballasted with bags of sand on pallets. The simulated pier was 36 inches in diameter and was supported in the longitudinal direction by two load cells. Force-versus-time data were obtained from the load cells."
Date: March 2011
Creator: Buth, Eugene; Brackin, Michael S.; Williams, William F. & Fry, Gary T.
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.
System: The Portal to Texas History
Delivery of workshops on corridor management and preservation in Texas (open access)

Delivery of workshops on corridor management and preservation in Texas

"This report summarizes the delivery and outcome of a series of workshops conducted at 23 Texas Department of Transportation (TxDOT) districts across the state on corridor management and preservation in Texas. The workshops served as follow-up implementation work for research project 0-5606, "Creating Partnerships with Local Communities to Manage and Preserve Corridors." The report provides an overview of the project and documents the dates, locations, and attendance of workshops implemented during the three-year project period."
Date: September 2010
Creator: Bochner, Brian S. & Hard, Edwin N.
System: The Portal to Texas History
Development guidance for sign design standards (open access)

Development guidance for sign design standards

"This two-year project was designed to provide TxDOT with comprehensive review and update of mounting details and standards for large and small sign supports, and to provide a mechanism for TxDOT to quickly and effectively evaluate and address high priority needs related to sign support systems."
Date: November 2011
Creator: Silvestri, Chiara; Arrington, Dusty R.; Bligh, Roger P. & Menges, Wanda L.
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.
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.
System: The Portal to Texas History
Development of a model performance-based sign sheeting specification based on the evaluation of nighttime traffic signs using legibility and eye-tracker data (open access)

Development of a model performance-based sign sheeting specification based on the evaluation of nighttime traffic signs using legibility and eye-tracker data

"This report focused on the evaluation of traffic sign sheeting performance in terms of meeting the nighttime driver needs. Using the luminance requirements derived from the study and market-weighted headlamp flux matrices, the researchers developed an approach to sigh sheeting specification that is based on nighttime driver needs."
Date: September 2010
Creator: Carlson, Paul J.; Miles, Jeffrey D.; Park, Eun Sug; Young, Sarah; Chrysler, Susan & Clark, Jerremy
System: The Portal to Texas History
Development of a model performance-based sign sheeting specification based on the evaluation of nighttime traffic signs using legibility and eye-tracker data : data and analysis (open access)

Development of a model performance-based sign sheeting specification based on the evaluation of nighttime traffic signs using legibility and eye-tracker data : data and analysis

"This report presents data and technical analyses for Texas Department of Transportation Project 0-5235. This project focused on the evaluation of traffic sign sheeting performance in terms of meeting the nighttime driver needs. The goal was to develop a nighttime driver needs specification for traffic signs. Full information on the project is presented in Report 0-5235-1 Volume 1."
Date: September 2009
Creator: Carlson, Paul J.; Park, Eun Sug & Miles, Jeffrey D.
System: The Portal to Texas History
Development of a precast bridge deck overhang system (open access)

Development of a precast bridge deck overhang system

This research investigated the overhang and shear capacity of a precast overhang system for potential use during the construction of bridges with precast overhang panels. The research was performed in three phases: the Phase 1 research including work specifically for the Rock Creek Bridge in Parker County, Texas; the Phase 2 research for general precast overhang panels, and; the Phase 3 research investigating the shear capacity. Grout material characteristics were also assessed for possible use in the haunch; constructability issues were also addressed.
Date: February 2011
Creator: Trejo, David; Head, Monique H.; Mander, John; Mander, Thomas J.; Henley, Mathew; Scott, Reece et al.
System: The Portal to Texas History
Development of field performance evaluation tools and program for pavement marking materials: technical report (open access)

Development of field performance evaluation tools and program for pavement marking materials: technical report

Report on a project is to investigate field evaluation plans and procedures, and develop field performance-based evaluation procedures for pavement marking materials.
Date: March 2011
Creator: Zhang, Yunlong; Ge, Hancheng; Pike, Adam & Carlson, Paul J.
System: The Portal to Texas History
Development of guidelines for pedestrian safety treatments at signalized intersections (open access)

Development of guidelines for pedestrian safety treatments at signalized intersections

"This document summarized the research conducted and the conclusions reached during the development of guidelines for pedestrian safety treatments at signalized intersections. The guidelines are focused on treatments that alleviate conflicts between left-turning vehicles and pedestrians."
Date: August 2011
Creator: Pratt, Michael P.; Songchitruksa, Praprut & Bonneson, James A.
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.
System: The Portal to Texas History
Development of performance-based evaluation methods and specifications for roadside maintenance (open access)

Development of performance-based evaluation methods and specifications for roadside maintenance

" This report documents the work performed during Project 0-6387, "Performance Based Roadside Maintenance Specifications." "
Date: October 2010
Creator: Gharaibeh, Nasir G.; Shelton, Debora; Ahmed, Jubair; Chowdhury, Arif & Krugler, Paul E.
System: The Portal to Texas History
Development of precast bridge deck overhang system: technical report (open access)

Development of precast bridge deck overhang system: technical report

"The testing and analyses documented in this report (0-6100-3) provides a new equation for determining the number of shear pockets required for the various shear connector/coupler systems evaluated in this research. This equation was used to determine the number of shear pockets required for the newer TxDOT girders."
Date: February 2010
Creator: Kim, Young Hoon & Trejo, David
System: The Portal to Texas History
Development of Texas Transportation Institute's asphalt compaction monitoring system (open access)

Development of Texas Transportation Institute's asphalt compaction monitoring system

"In recent years, the Texas Department of Transportation has made significant progress with the development and implementation of new technologies to measure the uniformity of new hot mix asphalt layer construction. In Project 0-6992, researchers took this check one step further by developing an accurate global positioning system tracking system for compaction rolling so that the compaction effort applied can be monitored for 100 percent of the new surface. This report presents details of the hardware and software developed in this study. The system was field tested on a number of new overlay projects in Texas."
Date: July 2012
Creator: Liu, Wenting; Scullion, Thomas & Kassem, Emad
System: The Portal to Texas History
Development of the Texas Revenue Estimator and Needs Determination System (T.R.E.N.D.S.) model :  FY 2010 activities (open access)

Development of the Texas Revenue Estimator and Needs Determination System (T.R.E.N.D.S.) model : FY 2010 activities

Report that recaps the continued development of the Texas Revenue Estimator and Needs Determination System model.
Date: July 2011
Creator: Ellis, David; Glover, Brianne; Norboge, Nicolas & Zhi, Yuan
System: The Portal to Texas History
Development of the Transportation Revenue Estimator and Needs Determination System (TRENDS) Forecasting Model: MPO Sub-Models and Maintenance (open access)

Development of the Transportation Revenue Estimator and Needs Determination System (TRENDS) Forecasting Model: MPO Sub-Models and Maintenance

"This report summarizes the technical work performed developing and incorporating Metropolitan Planning Organization sub-models into the existing Texas Revenue Estimator and Needs Determination System (TRENDS) model. Additionally, this report explains the maintenance and monthly updates performed on the TRENDS model."
Date: November 2011
Creator: Glover, Brianne; Norboge, Nicolas & Ellis, David
System: The Portal to Texas History
Effect of climate change on crop production patterns with implications to transport flows and inland waterways (open access)

Effect of climate change on crop production patterns with implications to transport flows and inland waterways

"This report analyzed the demand for transportation capacity and changes in transportation flows on inland waterways due to shifts in crop production patterns induced by climate change."
Date: December 2011
Creator: Vedenov, Dmitry V.; Fuller, Stephen W.; McCarl, Cruce A.; Attavanich, Witsanu & Ahmedov, Zafarbek
System: The Portal to Texas History