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25,204 Matching Results
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RTI Special Studies for TxDOT Administration in FY 2011
Abstract: 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 2011. Three short-term, quick-turnaround tasks were completed and are documented.
Date:
June 2012
Creator:
Persad, Khali; Zhang, Zhanmin; Qazi, Abds; Harrison, Robert; Trevino, Manuel & Khwaja, Nabeel
Object Type:
Report
System:
The Portal to Texas History
Identification of priority rail projects for Texas: initial methodology/user manual and guidebook
"This project developed a system of evaluative tools for the Texas Department of Transportation (TxDOT) to prioritize its investments in rail-related projects on a statewide basis. This work is meant to ensure that the limited available funding for rail projects is applied in the most beneficial and efficient manner and is focused upon addressing TxDOT's strategic goals. From the findings, researches recommend a transparent methodology for evaluating proposed rail projects and establishing an initial process through which rail-related investments can periodically be re-evaluated."
Date:
February 2012
Creator:
Morgan, Curtis Alan
Object Type:
Report
System:
The Portal to Texas History
Continuous prestressed concrete girder bridges. Volume 1, Literature review and preliminary designs
"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."
Date:
October 2011
Creator:
Mander, John B.; Parkar, Anagha S. & Hueste, Mary Beth D.
Object Type:
Report
System:
The Portal to Texas History
Pavement repair strategies for selected distresses in FM roadways
"Expansive soil is considered one of the most common causes of pavement distresses in FM roadways. Depending upon the moisture level, expansive soils will experience changes in volume due to moisture fluctuations from seasonal variations. The objective of this research was to evaluate existing repair projects on selected FM roadways. Those roadways experienced failures in the form of fatigue and rutting in the wheel path, and longitudinal (faulted) cracking including edge cracking. The causes of those failures were mainly linked to high PI expansive soil and narrow pavement" (from abstract).
Date:
June 2012
Creator:
Dessouky, Samer; Oh, Jeong Ho; Yang, Mijia; Ilias, Mohammad; Lee, Sang Ick; Freeman, Tom et al.
Object Type:
Report
System:
The Portal to Texas History
Developing a mixture design specification for flexible base construction
"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."
Date:
October 2011
Creator:
Epps, Jon A.; Sebesta, Stephen; Sahin, Hakan; Button, Joe; Luo, Rong & Lytton, Robert
Object Type:
Report
System:
The Portal to Texas History
San Marcos City Park archaeological survey, Hays County, Texas
"At the request of the City of San Marcos, the Center for Archaeological Studies (CAS) conducted archaeological testing of the playground in San Marcos City Park under Texas Historical Commission Antiquities Permit No. 2731. The testing was conducted on October 26 and 29, 2001, to determine whether scheduled renovation of the playground would disturb potentially intact prehistoric or historic cultural material. Shovel testing revealed possibly intact subsurface deposits below approximately 50 cm of disturbed deposits, and subsequently site 41HY319 was recorded. CAS assessed that it is unlikely that cultural resources would be impacted during construction of the playground equipment, as planned construction activities will not extend below the previously disturbed zone."
Date:
2002
Creator:
Bousman, C. Britt.; Nickels, David L. & Gibson, Connie Thompson.
Object Type:
Report
System:
The Portal to Texas History
Performance of lap splices in large-scale column specimens affectedby ASR and/or DEF
"This research program conducted a large experimental program, which consisted of the design, construction, curing, deterioration, and structural load testing of 16 large-scale column specimens with a critical lap splice region, and then compared and calibrated models developed in the analytical program with the experimental behavior. Specimens were carefully instrumented both internally and externally to monitor the strain behavior of the concrete and reinforcing steel from specimen construction, curing, deterioration, and final structural load testing."
Date:
June 2012
Creator:
Bracci, Joseph M.; Gardoni, Paolo; Eck, Kathleen M. & Trejo, David
Object Type:
Report
System:
The Portal to Texas History
Compilation of Results of Aquifer Tests in Texas
"The mission of the Texas Water Development Board's (TWDB) Groundwater Resources Division is to collect, interpret, and provide accurate, objective information on the groundwater resources of Texas. In support of this mission, the TWDB has undertaken a long-term process of mapping and characterizing the aquifers of Texas."
Date:
April 2012
Creator:
Wuerch, David Robert & Christian, Brent
Object Type:
Report
System:
The Portal to Texas History
Pecos Valley Aquifer, West Texas: Structure and Brackish Groundwater
"The pilot study has helped lay the foundation for future Brackish Resources Aquifer Characterization System projects by developing a database management system in which variety of data can be stored and processed."
Date:
June 2012
Creator:
Wise, Matthew R.; Kalaswad, Sanjeev & Meyer, John E.
Object Type:
Report
System:
The Portal to Texas History
Positive feedback: exploring current approaches in iterative travel demand model implementation
"This project researched current trends, practices, and tools in implementing a feedback approach for potential implementation in the TxDOT TDMs."
Date:
October 2011
Creator:
Reeder, Phillip; Bhat, Chandra; Lorenzini, Karen & Hall, Kevin
Object Type:
Report
System:
The Portal to Texas History
Statewide implementation of PAVE-IR in the Texas Department of Transportation
Report on demonstrations of Pave-IR thermal profiling on eight construction projects around Texas.
Date:
September 2011
Creator:
Scullion, Thomas & Scullion, Tom
Object Type:
Report
System:
The Portal to Texas History
Use of dowel bars at longitudinal construction joints
Report discussing the primary objective of this research project, whcih was to develop rational guidelines on the use of dowel bars in longitudinal construction joints (LCJs) for better-performing concrete pavements without potential longitudinal cracking problems.
Date:
August 2011
Creator:
Ha, Soojun; Cobos, Luis; Choi, Cheol Choi; Yeon, Jungheum; Cho, Byounghooi & Won, Moon C.
Object Type:
Report
System:
The Portal to Texas History
Rational Use of terminal Achorages in Portland Cement Concrete Pavements
Report describing the results of a study to look at various systems used to protect bridges from expansion of Portland cement concrete (PCC) due to changes in temperatures. It includes background information on the problem, identifies particular bridges that have concerns, a literature review on the topic, results of field experimentation, collection and analysis of data, and conclusions and recommendations, with supplementary references and appendices.
Date:
May 2012
Creator:
Jaiswal, Harshita; Ryu, Sungwoo; Choi, Pangil; Choi, Seongcheol; Jayawickrama, Priyantha; Senadheera, Sanjaya et al.
Object Type:
Report
System:
The Portal to Texas History
Implementation of technology for rapid field detection of sulfate and organic content in soils
This report discusses a protocol using the Veris 3150 for determination of sulfate-rich soils, which has been implemented to two full-scale projects in Dallas and Paris Districts.
Date:
March 2012
Creator:
Shon, Chang-Seon; Sebesta, Stephen & Scullion, Tom
Object Type:
Report
System:
The Portal to Texas History
Best Practice for Using RAS in HMA
"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."
Date:
October 2011
Creator:
Zhou, Fujie; Button, Joe W. & Epps, Jon
Object Type:
Report
System:
The Portal to Texas History
Project Report on the Continued Development and Analysis of the Flexible Pavements Database
Report on the development of the Texas Flexible Pavement database and the first 7 months of a stage two project, after which the project was terminated.
Date:
February 2011
Creator:
Banerjee, Ambarish; Aguiar-Moya, José Pablo; Sivaram, Prasad; Smit, Andre de F. & Prozzi, Jorge Alberto
Object Type:
Report
System:
The Portal to Texas History
Megaregion Freight Planning: A Synopsis
"Megaregion interest has grown strongly in the last decade and is now seen be a growing number of planners as offering effective contributions to problems such as modal congestion, development disparity, and air pollution that individual metropolitan areas or cities cannot resolve individually. Megaregion planning presents an alternative way of mitigating metropolitan problems of large-scale transportation systems, green infrastructure, and economic development and has attracted a number of transportation advocates since 2000."
Date:
March 2012
Creator:
Harrison, Robert; Johnson, Donovan; Loftus-Otway, Lisa; Hutson, Nathan; Seedah, Dan; Zhang, Ming et al.
Object Type:
Report
System:
The Portal to Texas History
Algorithms for Routing Vehicles and Their Application to the Paratransit Vehicle Scheduling Problem
"As the demand for paratransit services increases, there is a constant pressure to maintain the quality of service provided to the customers while minimizing the cost of operation: this is especially important as the availability of public funding for paratransit services has been on the decline. Key tasks in accomplishing this objective are efficiently allocating vehicles to service trips and adjusting the schedules of vehicles dynamically in response to calls received by the service providers from the customers on the day of the service."
Date:
March 2012
Creator:
Park, Myoungkuk; Oberlin, Paul; Rathinam, Sivakumar; Quadrifoglio, Luca & Darbha, Swaroop
Object Type:
Report
System:
The Portal to Texas History
Use of Performance Measurement to Include Air Quality and Energy Into Mileage-Based User Fees
"This research project is aimed at establishing a framework for levying MBUFs designed to achieve various air quality improvement policy objectives. This research presents the first step toward a pricing framework based on the concept of performance measurement that systematically defines and incorporates potential air quality goals. The process of developing the proposed framework included defining the interactive role of user fees and pricing in roadway transportation operations and identifying air quality performance measures for determining the appropriate vehicle mileage fee price."
Date:
March 2012
Creator:
Farzaneh, Reza; Novak, Kristen; Baker, Richard T. & Goodin, Ginger
Object Type:
Report
System:
The Portal to Texas History
Performance measures for metropolitan planning organizations
"The aim of this project is to consolidate available knowledge and provide guidance to transportation agencies, specifically MPOs, to help them incorporate performance measurement relating to transportation planning and operations. This research includes a survey of agency practices and agency needs, development of guidance on effective performance measurement and allied issues of strategic planning, goal setting, and data collection."
Date:
April 2012
Creator:
Moore, Devin; Ramni, Tara; Norboge, Nicolas & Turnbull, Katherine
Object Type:
Report
System:
The Portal to Texas History
Development of warrants for installation of dual right-turn lanes at signalized intersections
"Right-turn lanes provide space for the deceleration and storage of right-turn vehicle, and separate turning vehicles from through movements. Dual right-turn lanes are increasingly used at urban intersections primarily for two reason: (1) to accommodate high right-turn demands and avoid turn-pocket overflows, and/or (2) to prevent right-turn vehicles that exit from a nearby upstream freeway off-ramp (on the left of the roadway) from abruptly changing too many lanes toward the right-turn lane at intersection."
Date:
April 2012
Creator:
Chen, Xiaoming & Li, Da
Object Type:
Report
System:
The Portal to Texas History
Getting the Parking Right for Transit-Oriented Development
"The main objective of this study is to report the state-of-the-knowledge on parking regulations and practice influencing the planning, design, and implementation of TOD. The report first offers a narrative review of the published works on TOD-Parking. Based on the review findings it then presents a matrix of best parking practices for TOD."
Date:
March 2012
Creator:
Zhang, Ming; Mulholland, Katie; Zhang, Jane & Gomez-Sanchez, Ana J.
Object Type:
Report
System:
The Portal to Texas History
Development and validation of a testing protocol for carbon sequestration using a controlled environment
"This project conducted initial testing to develop a method for quantifying plant and soil carbon sequestration capabilities under the controlled conditions of the Texas Transportation Institute's Environmental and Emissions Research Facility (EERF)."
Date:
March 2012
Creator:
Storey, Beverly B.; Foster, Derrold; Johnson, Jeremy & McFalls, Jett
Object Type:
Report
System:
The Portal to Texas History
Fracture Properties and Fatigue Cracking Resistance of Asphalt Binders
"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."
Date:
March 2012
Creator:
Bhasin, Amit; Izadi, Anoosha & Motamed, Arash
Object Type:
Report
System:
The Portal to Texas History