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Traffic Calming Measures by
Roadway Type

Arterial vs. Residential Road Types

Speed Control Measure Arterial Residential
Police Enforcement  yes, enhanced  yes, routine
SMART trailer (flashing speed display) yes, 2 lane roadways only yes
Traffic Circles  yes, if designed to accommodate full movements by trucks and buses  yes, retrofit design
Speed Humps no generally yes
Curb Extensions yes yes 
Median or Pedestrian Refuge Island yes yes
Edgelines to narrow wide roadway to create parking lane or shoulder yes  yes

NOTE: Volume control measures are not used on arterial roadways and are considered on residential roadways only in accordance with Section 31-49, Residential Traffic Management Areas, Montgomery County Code 1994 and  Executive Regulation 17-94AM.

Traffic Engineering & Operations · Montgomery County Department of Transportation · 240-777-2190 · Fax: 240-777-6030 · 100 Edison Park Dr · 4th Floor · Gaithersburg, Maryland 20878 ·
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