Quantifying safety performance of driveways on state highways

This report documents a research effort to quantify the safety performance of driveways in the State of Oregon. In particular, this research effort focuses on driveways located adjacent to principal arterial state highways with urban or rural designations. This report includes safety performance functions (SPFs) that can be used to evaluate the safety impacts of various access management and driveway-related configurations on Oregon arterial corridors. The project team developed these safety metrics using statistical models and methodologies similar to those outlined in the Highway Safety Manual (HSM) published in 2010 by the American Association of State Highway and Transportation Officials (AASHTO). Instead of using a base condition SPF that included only segment length and traffic volume and then would need companion CMFs to fully analyze a corridor, the project team developed full model SPFs that do not require any additional adjustments. The resulting models varied for urban versus rural conditions, but type of land use and traffic volume were two consistently significant variables observed for both models. A companion smart spreadsheet accompanies this report to assist readers with implementation of the procedure.Title from PDF title page."August 2012.""FHWA-OR-RD-13-02"--Technical report documentation page.This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Includes bibliographical references (pages 61-63).Also available online at the Oregon Documents Repository.Sponsored by Oregon Dept. of Transportation, Research Section; Federal Highway Administration SPR 720System requirements: Adobe Acrobat Reader; CD-ROM drive.Final report