Pilot In-service Performance Evaluation of Guardrail Terminals in Washington State PDF Download
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Author: Paul Abbott (Of the Washington State Department of Transportation)
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 0
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Book Description
A pilot routine in-service performance evaluation (ISPE) was undertaken for guardrail terminals following the process outlined in NCHRP 22-33. Controlled stop, rollover, vehicle mix, and secondary impacts on the roadside and roadway were evaluated as performance measures using data sourced from the Crash Location & Analysis System (CLAS) database and the WSDOT Engineering Crash Data Mart for years 2016 through 2020. Four Performance Assessment Levels, ranging from no exclusions of crash data to exclusions of crash data limited to vehicle type and speed limit were assessed. For all five performance measures, the study found no measurable differences between the performance of the major types of guardrail terminal in use on state highways within WSDOT jurisdiction.
Author: Paul Abbott (Of the Washington State Department of Transportation)
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 0
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Book Description
A pilot routine in-service performance evaluation (ISPE) was undertaken for guardrail terminals following the process outlined in NCHRP 22-33. Controlled stop, rollover, vehicle mix, and secondary impacts on the roadside and roadway were evaluated as performance measures using data sourced from the Crash Location & Analysis System (CLAS) database and the WSDOT Engineering Crash Data Mart for years 2016 through 2020. Four Performance Assessment Levels, ranging from no exclusions of crash data to exclusions of crash data limited to vehicle type and speed limit were assessed. For all five performance measures, the study found no measurable differences between the performance of the major types of guardrail terminal in use on state highways within WSDOT jurisdiction.
Author: Pius O. Igharo
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 66
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Book Description
Author: National Academies of Sciences, Engineering, and Medicine (U.S.). Committee for Study of In-Service Performance of W-Beam Guardrail End Treatments, Phase 1
Publisher:
ISBN: 9780309460200
Category : Roads
Languages : en
Pages :
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Book Description
"TRB Special Report 323, In-Service Performance Evaluation of Guardrail End Treatments, develops a research design for evaluating the in-service performance of guardrail end treatments and other roadside safety devices and identifies the data required to do so. Given the substantial data requirements and methodological challenges of conducting successful evaluations of particular end treatments, the committee concludes that state highway agencies will require more information about the benefits, costs, and practicality of routine in-service evaluation of end treatments in general before deciding to undertake new data collection and analysis programs necessary to carry out more challenging analyses. The committee recommends research to advance practice and test the feasibility of and costs associated with more complex evaluations. It also recommends research to examine whether procedures for testing the performance of devices should be altered"--Provided by publisher.
Author:
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 256
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Book Description
Current methodologies for the in-service performance evaluation (ISPE) of roadside safety features are not viable and practical for all state departments of transportation. The research team developed an ISPE process that is sensitive to the data and resource constraints of Texas Department of Transportation (TxDOT). The following methodology was used to develop The TxDOT-ISPE process: identify the objectives of the ISPE, estimate expected extent of data collection, evaluate existing DOT procedures and organizational structure, identify features to be included in the ISPE, develop framework for an ideal ISPE, identify system constraints within the DOT, identify alternative methodologies and data sources for the ISPE, design DOT-specific ISPE process, design and conduct a pilot test of the ISPE, evaluate the data collection methodology and data quality during the pilot test, and recommend an ISPE process for TxDOT.
Author: Madhav V. Chitturi
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 29
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Book Description
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1044
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Book Description
Author:
Publisher:
ISBN:
Category : Transportation
Languages : en
Pages : 576
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Book Description
Author:
Publisher:
ISBN:
Category : Transportation
Languages : en
Pages : 312
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Book Description
Author:
Publisher:
ISBN:
Category : Government purchasing
Languages : en
Pages : 1974
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Book Description
Author: United States. Congress. House
Publisher:
ISBN:
Category : CD-ROMs
Languages : en
Pages : 2030
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Book Description
Some vols. include supplemental journals of "such proceedings of the sessions, as, during the time they were depending, were ordered to be kept secret, and respecting which the injunction of secrecy was afterwards taken off by the order of the House".
