Author: Francisco Daniel B. AlbuquerquePublisher:
ISBN:
Category : Roads
Languages : en
Pages : 148
Book Description
Phase I Assessment of Guardrail Length-of-need
Author: Francisco Daniel B. AlbuquerquePublisher:
ISBN:
Category : Roads
Languages : en
Pages : 148
Book Description
Roadside Design Guide
Author: American Association of State Highway and Transportation Officials. Task Force for Roadside SafetyPublisher:
ISBN:
Category : Roads
Languages : en
Pages : 560
Book Description
In-service Performance Evaluation of Guardrail End Treatments
Author: National Academies of Sciences, Engineering, and Medicine (U.S.). Committee for Study of In-Service Performance of W-Beam Guardrail End Treatments, Phase 1Publisher:
ISBN: 9780309441629
Category : Roads
Languages : en
Pages :
Book Description
Study charge and origin -- Committee task -- Objectives of in-service evaluation -- Evaluation methods -- Organization of the report -- Methods of measuring performance: Comparative evaluations -- Descriptive evaluations -- Nationally coordinated evaluation research: Evaluation objectives -- Sources for evaluation procedures -- Validating crash test procedures -- Evaluation methods for routine highway agency use -- Impact of design, installation, and maintenance practices on performance -- Planning and organization -- Annex 3-1: summary of procedural guides to in-service evaluation of roadside safety devices -- Routine in-service evaluation of roadside devices -- Objectives of routine evaluations -- Obstacles to evaluation -- Strengthening highway agency capacity to conduct evaluations -- Conclusions and recommendation
Risk Management and Assessment of Upgrading and Standardizing Guardrail
Author: Karen ZhuPublisher: Purdue University Press
ISBN: 9781622600557
Category : Transportation
Languages : en
Pages : 110
Book Description
The Indiana Department of Transportation (INDOT) has installed guardrail systems on interstate highways and other highways in accordance with a variety of standards throughout the years. Traffic volume has increased and the posted speeds have been raised on most INDOT's interstate highways. Consequently, the characteristics of run-off-the-road (ROR) crashes may have changed. In the meantime, material prices have increased considerably and the guardrail maintenance and crash repair costs have increased accordingly. There is no doubt all these changes will not only greatly affect the ROR crash prediction, but also greatly affect the guardrail benefit/cost analysis. This study examined the current use of roadside guardrails on INDOT intestates, State highways, and US highways, roadways, including types and lengths of guardrails, types and numbers of guardrail end treatments, and field guardrail positions. Based on the records of total 4657 ROR crashes occurred in 2004 and 2006, this study investigated the characteristics of ROR crashes, such as frequencies and locations of ROR crashes, crash consequences (number of vehicles involved, injuries and fatalities), and the effects of main factors, in particular roadway geometrics, seasons and traffic volume, on the highways of different classes. Furthermore, this study investigated the features of vehicle-guardrail crashes, including impact positions and corresponding frequencies and consequences. ROR crash predictions were examined in all aspects in this study, including encroachment rates, crash probabilities, and severity probabilities. It was found that the encroachment rates obtained by this study are less than those in the AASHTO Roadside Design Guide. This study evaluated the issues associated with the guardrail crash repair costs, such as parts costs, labor costs, and equipment costs.
Gravel Roads
Author: Ken SkorsethPublisher:
ISBN:
Category : Gravel roads
Languages : en
Pages : 112
Book Description
The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.
Guardrail Performance and Design
Author: Jarvis Dale MichiePublisher:
ISBN:
Category : Transportation
Languages : en
Pages : 432
Book Description
Barrier installations are warranted (or justified) only at highway locations where the consequence of an errant vehicle leaving the roadway is judged to be more hazardous than the impact with the barrier installation. A six degree-of-freedom mathematical model was found to be useful in describing dynamic behavior of a vehicle during impact. Predictions of vehicle and barrier behavior correlated with results obtained from full-scale crash tests. Crash conditions simulated with a computer were used to identify and evaluate vehicle static and dynamic as well as barrier parameters. Vehicle weight, yaw mass moment of inertia, and deformation constant were found to be significant.
Minimum Effective Guardrail Length for the MGS
Author: Nicholas A. WeilandPublisher:
ISBN:
Category : Roads
Languages : en
Pages : 234
Book Description
A detailed analysis of the minimum effective guardrail length for the MGS (Midwest Guardrail System).
Program Solicitation
Author: Development of a Cost-effectiveness Model for Guardrail Selection. Volume II: User's Manual. Final Report
Author: Lee R. CalcoteEvaluation of the Use and Effectiveness of Wildlife Crossings
Author: John A. BissonettePublisher: Transportation Research Board
ISBN: 0309117402
Category : Nature
Languages : en
Pages : 174
Book Description
TRB¿s National Cooperative Highway Research Program (NCHRP) Report 615: Evaluation of the Use and Effectiveness of Wildlife Crossings explores development of an interactive, web-based decision guide protocol for the selection, configuration, and location of wildlife crossings.