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Alternative Methods of Flexible Base Compaction Acceptance

Description: "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

Rational Use of terminal Achorages in Portland Cement Concrete Pavements

Description: 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.

Compendium of student papers: 2011 undergraduate transportation scholars program.

Description: Report compiling the research papers written by students participating in the 2011 Undergraduate Transportation Scholars Program. The papers in this compendium report on the following topics: evaluating the impact of nighttime work zone lighting characteristics n motorists; late night roadway visibility; investigation of the use and pricing of the I-15 express lanes in San Diego; intercity passenger rail access to airports: a case study at the Milwaukee airport; development of a background comp… more
Date: May 2012
Creator: Desorcie, Felicia; Jian, Ruoxin; Kelly, Pete; Larson, Shawn; Rasulo, Marcus; Rivera, Joshua et al.

Development of reliable pavement models

Description: "The current report proposes a framework for estimating the reliability of a given pavement structure as analyzed by the Mechanistic-Empirical Pavement Design Guide (MEPDG). The methodology proposes using a previously fit response surface, in place of the time-demanding implicit limit state functions used within the MEPDG, in combination with an analytical approach to estimating reliability using First-Order and Second-Order Reliability Methods (FORM and SORM). Additionally, in order to assess … more
Date: May 2011
Creator: Prozzi, Jorge Alberto & Aguiar-Moya, José Pablo

Managed lane travelers: do they pay for travel as they claimed they would?

Description: "This study examined if travelers are paying for travel on managed lanes (MLs) as they indicated that they would in a 2008 survey. To achieve the objectives, an Internet-based stated preferences (SP) survey of Houston's Katy Freeway travelers was conducted in 2010. Three survey design methodologies-Db-efficent, random level generation, and adaptive random-were tested in this survey."
Date: May 2011
Creator: Devarasetty, Prem Chand; Shaw, W. Douglass & Burris, Mark

The light-duty-vehicle fleet's evolution: anticipating Plug-In-Electric-Vehicle adoption and greenhouse gas emissions across the U.S. fleet

Description: "The first part of this report relies on stated and revealed preference survey results across a sample of U.S. households to first ascertain vehicle acquisition, disposal, and use patterns, and then simulate these for a synthetic population over time. The second part of this report relies on data from the U.S. Consumer Expenditure Survey (CEX) to estimate the welfare impacts of carbon taxes and household-level capping of emission (with carbon-credit trading allowed)."
Date: May 2011
Creator: Kockelman, Kara; Musti, Sashank & Paul, Binny

Development of a Special Topics Course on Civil Engineering Project Finance for the Zachry Department of Civil Engineering of Texas A&M University

Description: A project finance course integrated into the core curriculum for graduate civil engineering students. Even fewer programs treat project finance as a truly interdisciplinary topic. In fact, the topic of project finance often constitutes only a small part of the structured finance curricula. The purpose of this project was to bridge this gap by developing educational and teaching materials for an interdisciplinary course in project finance. This course communicates the implications of financ… more
Date: May 2011
Creator: Damnjanovic, Ivan & Aslan, Zafer

Guidance for erection and construction of curved I-girder bridges

Description: "This report summarizes the methods, results, and recommendations from a research investigation on the behavior of horizontally curved girders during construction. This information provides guidance on critical issues that bridge engineers face when designing curved steel plate I-girders."
Date: May 2010
Creator: Stith, Jason; Schuh, Andrew; Farris, Jamie; Petruzzi, Brian; Helwig, Todd; Williamson, Eric et al.

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

Description: 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-

Synthesis and Study of the Roadside Vegetation Establishment Process

Description: "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.

Recommendations for design, construction, and maintenance of bridge approach slabs

Description: Report regarding treatment methods for controlling settlements of approach slabs of new bridge construction. The report is presented in two parts, with the first part concerns the compiling and presentation of documented information while the second part deals with field evaluation of methods to reduce settlement.
Date: May 2012
Creator: Puppala, Anand J.; Archeewa, Ekarut; Saride, Sireesh; Hoyos, Laureano R., 1972- & Nazarian, Soheil, 1955-

Develop Mechanistic-Empirical Design for CRCP

Description: This report explains why a mechanistic-empirical (ME) based pavement design method will allow Texas Department of Transportation (TxDOT) to optimize pavement structures to best utilize the limited financial resources available.
Date: May 2012
Creator: Ha, Soojun; Yeon, Jungheum; Choi, Byounghooi; Jung, Youn su; Zollinger, Dan G.; Wimsatt, Andrew James, 1964- et al.

Work zone positive protection guidelines

Description: "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
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