Highway safety manual 2010 pdf free download

It is being made available for students preparing to take the Professional Engineers exam, which currently list this edition as a reference, but does not use the supplement. The Highway Safety Manual HSM was developed to help measurably reduce the frequency and severity of crashes on American roadways by providing tools for considering safety in the project development process. The HSM assists practitioners in selecting countermeasures and prioritizing projects, comparing alternatives, and quantifying and predicting the safety performance of roadway elements considered in planning, design, construction, maintenance, and operation.

The three-volume HSM features a synthesis of validated highway research, procedures for including safety in project decisions, and analytical tools for predicting impact on road safety. The HSM provides a science-based, technical approach that helps State and local agencies take the guesswork out of safety analysis. The HSM provides a science-based, technical approach to facilitate consideration of safety in roadway planning, design, operations, and maintenance decisions.

This allows safety to be quantitatively evaluated alongside other transportation performance measures such as traffic operations, environmental impacts, pavement durability, and construction costs.

The Highway Safety Manual HSM is the premier guidance document for incorporating quantitative safety analysis in the highway transportation project planning and development processes.

The HSM, developed by AASHTO and first published in with a supplement for freeways published in , presents contemporary scientific methodologies for estimating safety performance of highways and streets to inform the highway transportation decision-making process.

Transportation Research Board. Created Date: PM. It contains concepts, guidelines, and computational procedures for computing the capacity and quality of service of various highway facilities, including freeways, highways, arterial roads, roundabouts, signalized and unsignalized intersections, rural highways, and the effects of mass transit, pedestrians, and bicycles on the performance of these systems. There have been six editions with improved and updated procedures from to , and major updates to the HCM edition, in , and There are more than six decades of research behind the HCM.

The first edition of the Highway Capacity Manual was released in and contained pages broken apart into eight parts. The following editions were published by the Transportation Research Board in , , , and In the Transportation Research Board contracted the development of a major update to the Highway Capacity Manual.