TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 404: TRB’s State of the Practice in Highway Access Management examines current practice, potential barriers, and possible enhancements to highway access management programs. The report focuses on legal, legislative, policy, program, implementation, and effectiveness issues related to access management.

Appendixes A-D of NCHRP Synthesis 404 are available online. 

• Appendix A Access Management Survey
• Appendix B List of Responding Agencies
• Appendix C Summary of Survey Responses
• Appendix D Retrofit Toolbox