This project provides the Arizona Department of Transportation (ADOT) with recommendations and a framework for integrating the Highway Safety Manual (HSM) methods and tools to quantify safety performance into project planning and scoping and design processes. The research describes and associates types of safety analyses likely to be undertaken at ADOT during the project development process. The research also outlines which of these practices are current and which could be implemented in the long term and preliminary steps to achieve long term implementation. Research for this project was based on interviews with staff from ADOT's safety, planning, design and pre-design, traffic engineering, and risk management and tort liability business units, case studies demonstrating application of HSM procedures to two recent ADOT pavement preservation projects, interviews with two state DOTs considered leaders in integrating the safety analysis into their project development process and the research team's practical experience. The project concluded that ADOT can be successful implementing descriptive and quantitative safety analysis by committing to revise applicable policies and guidance documents, establishing an ADOT champion to lead this effort, and by dedicating funds to a comprehensive training program to ensure Department staff has the appropriate skills to meet the safety analysis requirements

TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 339: Centerline Rumble Strips (CLRS) examines current design, installation, configuration, dimension, and visibility issues associated with CLRS. The report addresses the need for guidance on warrants, benefits, successful practices, and concerns such as external noise and the reduced visibility of centerline striping material. Also addressed are pavement deterioration, ice buildup in the grooves, adverse impact on emergency vehicles, and the effect of CLRS on bicyclists. Particular attention was paid to available before-and-after CLRS installation crash data to document the safety aspects of CLRS and the availability of policies, guidelines, warrants, and costs regarding their use and design.

This synthesis report will be of interest to department of transportation administrators and transportation planning, right-of-way, economic development, and environmental planning staffs, as well as to the consultants that work with them. It would also appeal to regional and local government officials and staff, as well as to the private sector. It summarizes information about corridor management policies and programs at the federal, state, and local levels. An effort was made to select a diversity of methods and programs for the broadest treatment of the subject. The synthesis focuses more on roadway corridors than on transit or greenway corridors, but much of the information provided is relevant to any corridor management effort. This report examines state policies and programs, techniques applied, and coordination issues. A series of case studies provides more detailed study. This report of the Transportation Research Board documents successful partnerships. It presents examples of transportation agencies working together, proactively, with local governments and other stakeholders to achieve more cost effective and comprehensive solutions to transportation problems.