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FHWA Home / Safety / Proven Safety Countermeasures / Proven Safety Countermeasures - Corridor Access Management

Proven Safety Countermeasures

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For more information about this Proven Safety Countermeasure, visit the Office of Safety's Intersection Corridor Access Management web page.

Corridor Access Management

FHWA treskelion logo.
U.S. Department of Transportation
Federal Highway Administration


Corridor access management icon.

Corridor Access Management

This intersection design restricts left-turn movements to improve safety.
Source: FHWA


Reduction in total crashes
along 2-lane rural roads

Reduction in injury and fatal
crashes along urban/suburban arterials

Source: Highway Safety Manual

A raised median reduces conflict points along a divided roadway
Source: Missouri DOT

Access management refers to the design, application, and control of entry and exit points along a roadway. This includes intersections with other roads and driveways that serve adjacent properties. Thoughtful access management along a corridor can simultaneously enhance safety for all modes, facilitate walking and biking, and reduce trip delay and congestion.

Every intersection, from a signalized intersection to an unpaved driveway, has the potential for conflicts between vehicles, pedestrians, and bicycles. The number and types of conflict points—locations where the travel paths of two users intersect—influence the safety performance of the intersection or driveway.

The following access management strategies can be used individually or in combination with one another:

Successful corridor access management involves balancing overall safety and corridor mobility for all users along with the access needs of adjacent land uses.

Use of roundabouts, raised median, and right-in/right-out driveways can be an effective access management plan.
Source: FHWA-SA-15-005

For more information on this and other FHWA Proven Safety Countermeasures, please visit

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Office of Safety logo: Safe Roads for a Safer Future
Page last modified on October 17, 2017
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