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 Serial/Series Title: Research report (Austin, Tex.)
 Collection: Texas State Publications
Catalog of effective treatments to improve driver and worker safety at short-term work zones

Catalog of effective treatments to improve driver and worker safety at short-term work zones

Date: January 2001
Creator: Fontaine, Michael D. & Hawkins, H. Gene
Description: "This report catalogs several devices that were found to be effective at improving driver and worker safety at short-term work zones. The services include are: fluorescent yellow-green worker vests and hard hat covers, portable variable message signs, speed display trailers, fluorescent orange roll-up signs, radar drones, and retroreflective magnetic strips for work vehicles. The catalog provides a brief description of each treatment, along with a summary of the treatment's effectiveness, and recommendations for its use at short-term work zones."
Contributing Partner: UNT Libraries Government Documents Department
Lane assignment traffic control devices on frontage roads and conventional roads at interchanges

Lane assignment traffic control devices on frontage roads and conventional roads at interchanges

Date: October 2010
Creator: Nelson, Alicia A.; Tydlacka, Jonathan M.; Stevens, Roma G.; Chrysler, Susan T. & Voigt, Anthon P.
Description: "This project conducted state-of-the-practice surveys, focus groups, and driver surveys to develop test signs used for field deployment and evaluation regarding lane assignment on frontage roads and cross streets."
Contributing Partner: UNT Libraries Government Documents Department
Pavement preservation and system optimization task force

Pavement preservation and system optimization task force

Date: January 2011
Creator: Lomax, Timothy J.
Description: "This report provides: an overview of a proposed three-tier system, preliminary results from a state department of transportation (DOT) survey, initial estimates of required funding, ideas of UTP Category 1 Formula, and an overview of the status of mobility."
Contributing Partner: UNT Libraries Government Documents Department
Steel fiber replacement of mild steel in prestressed concrete beams

Steel fiber replacement of mild steel in prestressed concrete beams

Date: January 2011
Creator: Tadepalli, Padmanabha R.; Hoffman, Norman; Mo, Y. L. & Hsu, Thomas T. C. (Thomas Tseng Chuang), 1933-
Description: In traditional prestressed concrete beams, longitudinal prestressed tendons serve to resist bending moment and transverse mild steel bars (or stirrups) are used to carry shear forces. However, traditional prestressed concrete I-beams exhibit early-age cracking and brittle shear failure at the end zones despite the use of a high percentage of stirrups (4.2%). Moreover, producing and placing stirrups require costly labor and time. To overcome these difficulties, it is proposed to replace the stirrups in prestressed concrete beams with steel fibers.
Contributing Partner: UNT Libraries Government Documents Department
Texas Department of Transportation administration research: tasks completed Fiscal Year 2010

Texas Department of Transportation administration research: tasks completed Fiscal Year 2010

Date: February 2011
Creator: Baker, Richard; Ding, Liang; Epps, Jon; Estakhri, Cindy K.; Fry, Gray; Geiselbrecht, Tina et al.
Description: "This research project evaluates numerous transportation issues and develops findings and/or recommendations based on results. This project has been structured to address some of the emerging, critical, and unique considerations related to transportation."
Contributing Partner: UNT Libraries Government Documents Department
Analysis of roadway departure crashes on two-lane rural roads in Texas

Analysis of roadway departure crashes on two-lane rural roads in Texas

Date: September 2011
Creator: Lord, Dominique; Brewer, Marcus A.; Fitzpatrick, Kay; Greedipally, Srinivas R. & Peng, Yichuan
Description: "This three-year research effort was undertaken to identify factors that influence the number and severity of roadway departure crashes on rural two-lane highways in Texas and provide engineering countermeasures to reduce this type of crash. The study objectives were accomplished by analyzing crash, traffic flow, and geometric data between 2003 and 2008 and conducting site visits at 20 sites having the highest crash rates at four TxDOT districts."
Contributing Partner: UNT Libraries Government Documents Department
Best practice for using RAS in HMA

Best practice for using RAS in HMA

Date: October 2011
Creator: Zhou, Fujie.; Button, Joe W. & Epps, Jon
Description: "The use of recycles asphalt shingles (RAS) in hot-mix asphalt (HMA) mixtures has the potential to significantly reduce the cost of asphalt paving mixes while conserving energy and preserving the environment. This report documents the best practices for the use of RAS in HMA in terms of Ras processing, characterizing the processed RAS (binder content,gradations, and performance grad [PG]), RAS mix design, production, and field construction."
Contributing Partner: UNT Libraries Government Documents Department
Continuous prestressed concrete girder bridges. Volume 1, Literature review and preliminary designs

Continuous prestressed concrete girder bridges. Volume 1, Literature review and preliminary designs

Date: October 2011
Creator: Mander, John B.; Parkar, Anagha S. & Hueste, Mary Beth D.
Description: "The Texas Department of Transportation (TxDOT) is currently designing typical highway bridge structures as simply supported using standard precast, pretension-ed girders. TxDOT is interested in developing additional economical design alternatives for longer span bridges, through the use of the continuous precast, pretension-ed concrete bridge structures that use spliced girder technology. The objectives of this portion of the study are to evaluate the current stat-of-the-art and practice relevant to continuous precast concrete girder bridges and recommend suitable continuity connections for use with typical Texas bridge girders."
Contributing Partner: UNT Libraries Government Documents Department
Determination of minimum height and lateral design load for MASH test level 4 bridge rails

Determination of minimum height and lateral design load for MASH test level 4 bridge rails

Date: October 2011
Creator: Bligh, Roger P.; Menges, Wanda L. & Sheikh, Nauman Mansoor
Description: "This research had the objectives of determining the minimum rail height and lateral design impact load for MASH test level 4 bridge rails. Using parametric finite element analysis and subsequent crash testing, the researchers determined the minimum recommended rail height for MASH TL-4 impact conditions to be 36 inches. Later Design impact for MASH TL-4 test conditions was determined to be 80 kips."
Contributing Partner: UNT Libraries Government Documents Department
Developing a mixture design specification for flexible base construction

Developing a mixture design specification for flexible base construction

Date: October 2011
Creator: Epps, Jon A.; Sebesta, Stephen; Sahin, Hakan; Button, Joe; Luo, Rong & Lytton, Robert
Description: "In the Texas Department of Transportation (TxDOT), flexible base producers typically generate large stockpiles of material exclusively for TxDOT projects. This large "state-only" inventory often maintained by producers, along with time requirements for testing and reduced manpower within TxDOT offices, resulted in this project's investigation into a mixture-design specification for flexible base. The goals of this project are to develop a flexible base specification that reduces TxDOT's burden for sampling and testing, reduces time and space burdens on producers for maintaining TxDOT-only stockpiles, and maintains or improves the quality of the base."
Contributing Partner: UNT Libraries Government Documents Department
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