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The purpose of guardrail is to reduce the potential for, and the severity of accidents involving vehicles that run off the road. The following parameters are useful in evaluating a location for the need of guardrail:

  • Distance from the roadway to the hazard
  • Embankment height and slope
  • Speed and volume of traffic
  • Horizontal and vertical alignment of the roadway
  • Accident history

Click on this link to request a New Installation.

For additional information concerning guardrail go to the  Federal Highway Administration.

To address any issues concerning damaged guardrail, please report the location to the Division of Highway Services.

For additional general information, please contact: 

Division of Traffic Engineering and Operations
Traffic Engineering Design and Operations Section
100 Edison Park Drive, 4th Floor
Gaithersburg, Maryland 20878

Telephone: 240-777-0311 
Fax: 240-777-2080



Traffic Engineering & Operations · Montgomery County Department of Transportation · 240-777-2190 · Fax: 240-777-6030 · 100 Edison Park Dr · 4th Floor · Gaithersburg, Maryland 20878 ·
For any MCDOT service requests, call 311. Outside the county, call 240-777-0311 or submit via the website.   For website issues, broken links or comments, please email us(does not handle service requests).
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