Washington State Transportation CenterOverview
Publication Timeline
Most widely held works about
Washington State Transportation Center
Most widely held works by
Washington State Transportation Center
Traffic data collection, analysis, and forecasting for mechanistic pavement design
by Cambridge Systematics
(
Book
)
2 editions published in 2005 in English and held by 123 libraries worldwide
An evaluation of granular overlays in Washington State final technical report
(
Book
)
1 edition published in 1992 in English and held by 78 libraries worldwide
Guidelines for spring highway use restrictions
(
Book
)
6 editions published between 1985 and 1987 in English and held by 69 libraries worldwide Air temperature based criteria were developed which can be used to estimate when to apply and remove load restrictions.
Analysis and design of wire mesh/cable net slope protection
(
Book
)
4 editions published between 2005 and 2008 in English and held by 38 libraries worldwide This report summarizes research that characterized existing performance, tested critical system components, back-analyzed system failures, evaluated typical loading conditions, and developed analytical models to refine engineering design of wire mesh/cable net slope protection. Finally, guidelines were developed to support the design of these systems for a variety of loading conditions. Specifically, the report provides design guidance on site suitability, characterizing external loads, fabric selection, anchorage requirements, and system detailing.
Transit implications of HOV facility design
by G. Scott Rutherford
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Book
)
3 editions published between 1995 and 1996 in English and held by 26 libraries worldwide
ATIS evaluation framework
(
Book
)
1 edition published in 2005 in English and held by 26 libraries worldwide Evaluates five Washington State advanced traveler information system projects: Edmonds Ferry Terminal, SR 101, SR 2 and SR 97, SR 395, and Tacoma Traffic Management Center enhancement.
Assessing the benefits of traveler and transportation information systems
by Taryn Kristof
(
Book
)
1 edition published in 2005 in English and held by 26 libraries worldwide
Options for benchmarking performance improvements achieved from construction of freight mobility projects
by Edward Donald McCormack
(
Book
)
1 edition published in 2005 in English and held by 25 libraries worldwide
WSDOT's role in transportation demand management : strategic interest, structure, and responsibilities
(
Book
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1 edition published in 2005 in English and held by 25 libraries worldwide
Travel indicators and trends in Washington State
by Anne Vernez Moudon
(
Book
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1 edition published in 2005 in English and held by 25 libraries worldwide
Measurement of recurring and non-recurring congestion : phase 2
(
Book
)
1 edition published in 2005 in English and held by 24 libraries worldwide
Quantifying incident-induced travel delays on freeways using traffic sensor data
by Yinhai Wang
(
Book
)
5 editions published in 2008 in English and held by 23 libraries worldwide Traffic congestion is a major operational problem for freeways in Washington State. Recent studies have estimated that more than 50 percent of freeway congestion is caused by traffic incidents. To help the Washington State Department of Transportation (WSDOT) identify effective countermeasures against such congestion-inducing incidents, a thorough understanding of travel delays caused by incidents is essential. By using traffic data extracted from archived loop detector measurements and incident log data recorded by the WSDOT Incident Response (IR) team, this research project developed a new algorithm for quantifying travel delays produced by different incident categories. The algorithm applies a modified deterministic queuing theory to estimate incident-induced delay by using 1-minute aggregated loop detector data. Incident-induced delay refers to the difference between the total delay and the recurrent travel delay at the time and location influenced by the incident. The uniqueness of the delay calculation in this study is the use of a dynamic traffic-volume-based background profile, which is considered a more accurate representation of prevailing traffic conditions. According to the test results, the proposed algorithm can provide good estimates for incident-induced delay and capture the evolution of freeway traffic flow during incident duration. Because actual traffic data measured by loop detectors were used in this study to compute vehicle arrival and departure rates for delay calculations, the estimated incident-induced delay should be very close to the reality. Additionally, the proposed algorithm was implemented in the Advanced Roadway Incident Analyzer (ARIA) system. ARIA is a database-driven computer system that automates all the computational processes. More accurate incident delay information will help WSDOT improve its understanding of congestion-inducing incidents and select more effective countermeasures against incident-related traffic congestion on freeways.
The automated use of un-calibrated CCTV cameras as quantitative speed sensors, Phase 3
by Daniel J Dailey
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Book
)
2 editions published between 2005 and 2006 in English and held by 23 libraries worldwide
Anchorage of large-diameter reinforcing bars grouted into ducts
(
Book
)
2 editions published in 2008 in English and held by 23 libraries worldwide The use of a few large-diameter reinforcing bars for the construction of precast concrete bridge bents allows simplified construction by reducing the number of alignments to be made in the field. These bars are grouted into ducts in a precast concrete cap beam. In the proposed precast concrete substructure system, the grouted bars carry tensile forces across the joint between the column and cap beam. This joint is the yielding element in the structural system, and it is crucial to the performance of the structure that the bars yield before other failure mechanisms, including bond failure, occur. However, the cap beam is typically insufficient to anchor the bar, as the depth of the beam is substantially less than the American Association of State Highway and Transportation Officials (AASHTO) bridge code allows. For this project, 17 pullout tests were conducted to determine the bond characteristics and development length of large-diameter bars grouted into ducts. The bars tested ranged in size from #8 to #18. Pullout tests conducted with embedment lengths of at least six bar diameters yielded the reinforcing bar, while the test conducted with an embedment length of 14 bar diameters resulted in bar fracture. The tests and subsequent analysis showed that the bond of these grouted connections is significantly better than the bond of bars cast directly into concrete. The development lengths needed to fully anchor the bar are therefore within the depth available in the cap beam.
AVL-equipped vehicles as speed probes : (final phase)
by Daniel J Dailey
(
Book
)
2 editions published in 2005 in English and held by 23 libraries worldwide
Seismic assessment and retrofit of existing multi-column bent bridges
by Cole C McDaniel
(
Book
)
1 edition published in 2006 in English and held by 23 libraries worldwide
The CTR performance grant program : strengthening the program's structure and market
(
Book
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1 edition published in 2005 in English and held by 23 libraries worldwide
Information tools to improve post-earthquake prioritization of WSDOT bridge inspections
(
Book
)
1 edition published in 2005 in English and held by 23 libraries worldwide
The use of small unmanned aircraft by the Washington State Department of Transportation
by Edward Donald McCormack
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Book
)
2 editions published in 2008 in English and held by 22 libraries worldwide Small, unmanned aerial vehicles (UAVs) are increasingly affordable, easy to transport and launch, and can be equipped with cameras that provide information usable for transportation agencies. The Washington State Department of Transportation conducted a series of UAV tests to evaluate their capabilities while also exploring institutional issues. These tests, while exploring the general capabilities of UAVs, focused on evaluating the use of a UAV as an avalanche control tool on mountain slopes above state highways. WSDOT's maintenance division has an active snow avalanche control program that is designed to reduce highway closure time and hazards to motorists, and the use of UAVs was seen as having some potential operational advantages. The UAVs also captured aerial images suitable for traffic surveillance and data collection. The evaluation found that the main limitation to UAV use is institutional, particularly the need to obtain approval to fly from the Federal Aviation Administration (FAA). This approval process will make UAV use a challenge, but these issues may change as the FAA considers new rules.
Analytical modeling of foundations for seismic analysis of bridges
by William F Cofer
(
Book
)
2 editions published in 1994 in English and held by 12 libraries worldwide more
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Audience Level
 Related Identities
Associated Subjects
Bridges--Earthquake effects Bridges--Foundations and piers Bridges--Foundations and piers--Testing Bridges--Maintenance and repair Choice of transportation Commuting Disabled vehicles on express highways Earthquake hazard analysis Earthquake resistant design Express highways--Management Ferries High occupancy vehicle lanes High occupancy vehicle lanes--Evaluation Highway communications Intelligent transportation systems Local transit Motor vehicles--Speed--Measurement Pacific Ocean--Puget Sound Pavements--Live loads Pavements--Overlays Road drainage--Environmental aspects Roads--Frost damage Runoff--Environmental aspects Rural roads--Maintenance and repair Shipment of goods Slopes (Soil mechanics) Soil liquefaction Statistics Traffic accidents Traffic congestion Traffic congestion--Prevention Traffic engineering Traffic flow Traffic flow--Management Traffic flow--Measurement Traffic safety Traffic signs and signals Traffic surveys Traffic surveys--Data processing Transportation Transportation--Planning Trucking United States Urban transportation--Planning Washington (State) Washington (State).--Dept. of Transportation Washington (State)--King County Washington (State)--Puget Sound Region Washington (State)--Seattle Washington (State)--Seattle Metropolitan Area
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Alternative Names
TRAC (Washington State Transportation Center)
University of Washington. Washington State Transportation Center
Washington (State). State Transportation Center
Washington State Transportation Research Center
Washington State University. Washington State Transportation Center
Washington (State). Washington State Transportation Center
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