2013 ... Khali R. Persad [and four others] · The objective of the work documented in this report was to examine full-time-equivalent (FTE) staffing needs for TxDOT project development and construction, and analyze needs for backlogging projects, i.e., preparing construction plans in advance and keeping them at the ready for possible
6581-CT-5 [CTR] ... FHWA/TX-13/0-6581-CT-5
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2013 ... Khali Persad [and four others] · This research project was established by TxDOT’s Research and Technology Implementation Office to address special studies required by the department’s Administration during FY 2012. Three tasks were completed and are documented. · CONTENTS: Chapter 1. Introduction -- Chapter 2.
0-6581-CT-4 [CTR] ... FHWA/TX-13/0-6581-CT-4
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2013 ... Eric R. Giannini [and six others] · Alkali-silica reaction (ASR) and delayed ettringite formation (DEF) are expansive reactions that can lead to the premature deterioration of concrete structures. Both have been implicated in the deterioration of numerous structures around the world, including many transportation structures in Texas.
6491-1 [CTR] ... FHWA/TX-13/0-6491-1
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[2013] ... Research Performed by: Center for Transportation Research; Research Supervisor: Carlos H. Caldas; Researchers: Tyler Stock [and four others] · "Since the enactment of the National Environmental Protection Act (NEPA) in 1970, sponsors of transportation projects that receive federal money or fall under the purview of the
6701 PSR [CTR] ... 0-6701-S ... Project Summary
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[2013] ... Research Performed by: Center for Transportation Research; Research Supervisor: Kevin Folliard; Researchers: Eric R. Giannini [and five others] · "Alkali-silica reaction (ASR) and delayed ettringite formation (DEF) are expansive reactions that can lead to the premature deterioration of concrete structures. Both have been
6491 PSR [CTR] ... 0-6491-S ... Project Summary
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[2013] ... Research Performed by: Center for Transportation Research; Research Supervisor: Oguzhan Bayrak; Researchers: Nancy Larson [and three others] · "Diagonal web cracking of inverted-T straddle bent caps has been reported with increasing frequency in Texas, triggering concerns about current design procedures for such
6416 PSR [CTR] ... 0-6416-S ... Project Summary
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[2013] ... Research Performed by: Center for Transportation Research; Research Supervisor: David W. Fowler; Researchers: Marc Rached, David P. Whitney · "The Dallas and Fort Worth Districts use large quantities of concrete for high-traffic roadways; however, the sources of natural fine aggregates meeting the Texas Department of
6255 PSR [CTR] ... 0-6255 -S ... Project Summary
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2013 ... Li Wang [and four others] · Very short duration maintenance operations (VSDOs) last for 15 minutes or less and usually involve operations such as removing an object from the roadway (either on the pavement or adjacent shoulder) or pothole patching. These activities have the potential to interrupt traffic flow and can pose a
6640-1 [CTR] ... FHWA/TX-13/0-6640-1
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[2013] ... Research Supervisor: Oguzhan Bayrak; Researchers: Catherine Hovell [and five others] · "In 2007, the Texas Department of Transportation (TxDOT) initiated Project 0-5831 to investigate the behavior of U-beams and box beams at prestress transfer and under shear loading. The primary goal of this project was to simplify the
5831 PSR [CTR] ... 0-5831-S ... Project Summary Report
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[2013] ... Research Supervisor: Kenneth H. Stokoe II; Researchers: Jung-Su Lee [and four others] · "The predecessor of the total pavement acceptance device (TPAD) is the rolling dynamic deflectometer (RDD). The RDD was developed by the Center for Transportation Research (CTR) at the University of Texas at Austin (UT) with
6005 PSR [CTR] ... 0-6005-S ... Project Summary Report
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2013 ... Catherine Hovell [and five others] · The Texas U-Beam standard designs were released in the 1990’s and have been used increasingly in bridges across the state since. While prototypes of the 54-in. deep prestressed concrete beam were built during the design phase, no full-scale load tests were performed. This study of the U-
5831-2 [CTR] ... FHWA/TX-13/0-5831-2
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2013 ... Kara Kockelman, T. Donna Chen · Transportation projects and policies are rooted in economic considerations and consequences. This report documents the development of a relatively comprehensive transportation economics reference for practitioners, entitled "The Economics of Transportation Systems: A
6628-1 [CTR] ... FHWA/TX-12/0-6628-1
Full-text Link:
2013 ... Oghuzan Bayrak [and nine others] · Bridge decks composed of precast, prestressed panels (PCPs) overlain by cast-in-place (CIP) are popular in many states, including Texas. Optimization of top-mat reinforcement and reduction of collinear panel cracking were addressed in this project. Longitudinal top-mat reinforcement was
6348-2 [CTR] ... FHWA/TX-12/0-6348-2
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2013 ... Robert Harrison and Manuel Trevino · This report covers a four-year period after contractors started work on the third set of locks, which in 2015 will effectively double the size of the ship using the Panama Canal. Many of the impacts linked to the new locks remain unknown (like lock fees, demand, and shipper response) but it
2013-476660-00062-1 [CTR] ... SWUTC/13/476660-00062-1
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2013 ... Dr. Kara Kockelman [and four others] · "Transportation planning involves evaluating the congestion, safety, emissions, and other impacts of large-scale network improvements and policy implementations. This document is a User’s Guide for the Project Evaluation Toolkit (PET), a sketch planning toolkit developed for
6487-P1 [CTR] ... 0-6487-P1 / 5-6235-01-P1; Product 5-6235-01-P2; Product 5-6235-01-P3; Product 5-
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[2013] ... by T. Donna Chen [and four others] · This disc contains 3 PowerPoint presentation files from training webinars held in August 2012 on "The Economics of Transportation Systems." · CONTENTS: Module 1, Introduction to the Reference Movement, Transport, & Location Costs & Benefits of Transportation -- Module 2, Methods for
6628-P2 [CTR] ... Product 0-6628-P2
Full-text Link:
2013 ... Dr. Kara Kockelman, T. Donna Chen, and Brice Nichols · "Transportation planners and engineers often feel unfamiliar with economic principles, and some assume that economics does not apply to their job duties. In practice, most transportation professionals can regularly employ economic concepts and techniques for decision-
6628-P1 [CTR] ... Product 0-6628-P1
Full-text Link:
[2013] ... Ken Stokoe II, June-Su Lee · Product information and user guides for various components of the TPAD (Total Pavement Acceptance Device). · Publication date based on e-mail from CTR publication department, 2/18/2013.; Title from Texas Department of Transportation memo dated 1/10/2013.; At end of title: "Note: The
6005-P5 [CTR] ... Product 0-6005-P5
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2013 ... Kara Kockelman, Dan Fagnant, Brice Nichols, Steve Boyles · This report summarizes research for TxDOT Project No. 0-6487, which enhanced and expanded the open-source Project Evaluation Toolkit (PET) to evaluate operational strategies for transport project (and policy) impact evaluation. Such strategies include
6487-1 [CTR] ... FHWA/TX-2013/0-6487-1
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2013 ... Corey Meeks, Dr. Kevin Folliard · Under TxDOT Project 0-4563, researchers at The University of Texas at Austin developed an innovative software package known as ConcreteWorks, which gives laboratory technicians, engineers, inspectors, and contractors a tool that combines concrete design, analysis, and performance prediction to
4563-01-1 [CTR] ... FHWA/TX-12/5-4563-01-1
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[2013] ... Research Performed by: Center for Transportation Research; Research Supervisor: Oguzhan Bayrak; Researchers: David Garber [and four others] · "In 2008, TxDOT initiated Project 0-6374 to investigate prestress losses in pretensioned concrete girders. The prestress loss estimates in the AASHTO LRFD Bridge Design
6374 PSR [CTR] ... 0-6374-S ... Project Summary
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[2013] ... Research Performed by: Center for Transportation Research; Research Supervisor: S. Travis Waller; Researchers: Jennifer C. Duthie [and seven others] · "The Texas Department of Transportation (TxDOT) made geometric changes to the MoPac Expressway near the downtown Austin area in September 2010 to alleviate the
6657 PSR [CTR] ... 0-6657-S ... Project Summary
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[2013] ... Research Performed by: Center for Transportation Research; Research Supervisor: K. Folliard; Researchers: K. Kruse [and three others] · "Fly ash is a byproduct material produced from coal-combustion power plants and is one of the most commonly used supplementary cementing materials (SCMs) in the world. Prudent use
6648 PSR [CTR] ... 0-6648-S ... Project Summary
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[2013] ... Research Performed by: Center for Transportation Research; Research Supervisor: Dr. Kara M. Kockelman; Researchers: T. Donna Chen [and four others] · "While many transportation planners and engineers feel unfamiliar with economic principles, their daily job duties frequently involve economic decisions. While these
6628 PSR [CTR] ... 0-6628-S ... Project Summary
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[2013] ... Research Performed by: Center for Transportation Research; Research Supervisor: Dr. Kara Kockelman; Researchers: Stephen Boyles, Daniel Fagnant, Brice Nichols · "Preliminary project analysis and comparison are important for agencies in funding considerations and anticipating network impacts. Agencies are
6487 PSR [CTR] ... 0-6487-S ... Project Summary
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[2013] ... Research Performed by: Center for Transportation Research; Research Supervisor: Richard E. Klingner; Researchers: Oguzhan Bayrak [and eight others] · "Bridge decks composed of precast, pre-stressed panels (PCPs) overlain by cast-in-place (CIP) are popular in many states of the United States, including Texas...
6348 PSR [CTR] ... 0-6348-S ... Project Summary
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[2012], ©2011 ... Marc Rached, David W. Fowler, David P. Whitney · This report summarizes findings and recommendations regarding the usage of manufactured fine aggregates in portland cement concrete pavement (PCCP). The supporting research included both field and laboratory testing of aggregates and concrete properties
6255-P4 [CTR] ... FHWA/TX-11/0-6255-P4
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2012 ... by Jennifer Duthie, Fernanda Leite · This CD-ROM contains a PDF "Very Short Duration Operations: Safety Guidebook" and a 55-slide Microsoft PowerPoint (.pptx) presentation "TXDOT RESEARCH PROJECT 0-6640 STATE OF THE PRACTICE FOR WORKERS IN VERY SHORT DURATION WORK ZONE OPERATIONS Educational
6640-P2 [CTR] ... Product 0-6640-P2
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2012 ... Research Performed by: Center for Transportation Research; Research Supervisor: Randy B. Machemehl; Researchers: Li Wang [and three others] · "The safety of workers and motorists is a major concern, and the Federal Highway Administration recognizes this challenge and makes provisions for work zone safety in the
6640-PSR [CTR] ... PSR 0-6640 ... Project Summary Report
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2012 ... [Research Performed by: Center for Transportation Research; Research Supervisor: Zhanmin Zhang; Researchers: Mike Murphy and six others] · "The Texas Department of Transportation (TxDOT) is responsible for maintaining more than 190,000 lane miles of highways. TxDOT is not only obligated to preserve the pavements in
6623-PSR [CTR] ... PSR 0-6623 ... Project Summary Report, 0-6623
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[2012] ... [Research Performed by: Center for Transportation Research; Research Supervisor: Dr. Kevin Folliard; Researchers: Phil Pesek and three others] · "While early-age cracking will not cause failure of a bridge deck system independently, the penetration of deleterious substances through the early-age cracks into the bridge deck
6332 PSR [CTR] ... 0-6332-S ... Project Summary Report
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[2012] ... [Research Performed by: Center for Transportation Research; Research Supervisor: Amit Bhasin; Researcher: Zelalem Arega] · "Several independent research studies have made broad comparisons between the engineering properties and performance of WMA mixtures to conventional HMA mixtures. However, there has been
6591 PSR [CTR] ... 0-6591-S ... Project Summary Report
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2012 ... Zelalem Arega, Amit Bhasin · This document provides recommendations for warm-mix asphalt mixtures based on the results of tests conducted under TxDOT research project 0-6591. · CONTENTS: Chapter 1. Introduction and Background -- Chapter 2. Fatigue Cracking and Moisture Damage Resistance of Asphalt Mortars --
6591-P1 [CTR] ... Product 0-6591-P1
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2012 ... Zelalem Arega, Amit Bhasin · Since the introduction of warm mix asphalt (WMA) in the United States, a variety of different technologies and processes have been developed and used to achieve proper mixing and compaction at reduced temperatures compared to conventional hot mix asphalt (HMA). A better understanding of
6591-1 [CTR] ... FHWA/TX-12/0-6591-1
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2012 ... Epigmenio Gonzalez [and six others] · This document contains information about a workshop held November 8, 2010, on the topic of TxCAP for TxDOT research project 0-6623. "The Texas Condition Assessment Program (TxCAP) combines information from PMIS, TxMAP, and TxTAP to get an overall picture of state roads.
6623-P2 [CTR] ... Product 0-6623-P2
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2012 ... by Jorge Prozzi and Ambarish Banerjee · Pavement structures are designed for a finite life, usually referred to as performance period. This performance period is typically between 20 to 25 years for flexible pavements and between 25 and 40 years for rigid pavements. After this period, the pavement is predicted to reach
2012-161125-1 [CTR] ... SWUTC/12/161125-1
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2012 ... by Jorge Prozzi, Ph.D · The Highway Economic Requirements System-State Version (or the HERS-ST) is a software package which was developed by the Federal Highway Administration as a tool for evaluating the performance of state highway systems. HERS-ST has the capabilities of estimating highway system performance
2012-169205-1 [CTR] ... SWUTC/12/169205-1
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2012 ... by Yao Yu and Randy Machemehl · This report focuses on real time optimization of the Commuter Rail Circulator Route Network Design Problem (CRCNDP). The route configuration of the circulator system – where to stop and the route among the stops – is determined on a real-time basis by employing adaptive Tabu Search to
2012-476660-00078-1 [CTR] ... SWUTC/12/476660-00078-1
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2012 ... by Katherine Kortum and Randy Machemehl · Free-floating carsharing systems are among the newest types of carsharing programs. They allow one-way rentals and have no set “homes” or docks for the carsharing vehicles; instead, users are permitted to drive the vehicles anywhere within the operating zone and leave the
2012-476660-00079-1 [CTR] ... SWUTC/12/476660-00079-1
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2012 ... CTR: Prozzi J. [and nine others]; University of Texas at San Antonio: Weismann, J., Weismann, A. · In Rider 36, the Texas Legislature in the 2012-2013 General Appropriations Act directed the Texas Department of Transportation (TxDOT) to conduct a study on road damage caused by oversized and overweight (OS/OW) vehicles
6736-2 [CTR] ... FHWA/TX-13/0-6736-2
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2012 ... Zhanmin Zhang, Michael R. Murphy · The Texas Department of Transportation (TxDOT) is responsible for a vast managed pavement network: 79,991 centerline miles of highways and 49,829 bridges. Rider 55 of the appropriations bill for TxDOT requires that prior to the beginning of each fiscal year, the department provide the
9035-01-P8 [CTR] ... Product 5-9035-01-P8
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