Research | 2017

FHWA Safety Evaluation of Access Management Policies and Techniques

  • Published by:  Federal Highway Administration (FHWA)
  • Co-authored by:  Wei Zhang

This document is a technical summary of the Federal Highway Administration report,
Safety Evaluation of Access Management Policies and Techniques, FHWA-HRT-14-057.


Access management is the process that provides (or manages) access to land development while simultaneously preserving the flow of traffic on the surrounding road network for safety, capacity, and speed. Access management provides important benefits to the transportation system. These benefits have been increasingly recognized at all levels of government, and a growing number of States, cities, counties, and planning regions are managing access by requiring driveway permit applications and establishing where new access should be allowed. They are also closing, consolidating, or improving driveways, median openings, and intersections as part of their access management implementation strategy. However, these decisions are often challenged for various reasons.

Additional information is needed to help guide decisions related to access management. This information will help agencies better explain the safety and operational benefits of their policies and practices. Previous studies and empirical evidence have shown positive operational and safety benefits associated with good access management practices. While the operational effects of access management have been investigated quantitatively through different modeling and analysis approaches, there have been few scientifically rigorous evaluations to quantify safety effectiveness, particularly for corridor access management. The Federal Highway Administration initiated this study to help fill some of the research gaps, namely quantifying the safety impacts of corridor access management decisions.

FHWA, Tech Brief