Residential Traffic Calming Program

Speeding and unsafe driving practices on residential streets are a continuing concern to County residents and to the government agencies charged with ensuring traffic safety. Excessive speeds jeopardize both the safety and "liveability" of our neighborhoods. The Department of Transportation (DOT) and the Department of Police have cooperatively implemented a comprehensive residential speed control program which enlists community residents in helping to solve the speeding problem and improve the residential environment. The program includes the three components necessary to successfully reduce speeding: education, engineering and enforcement.

DOT and the police provide traffic safety services for over 1600 miles of residential streets. In order to provide the most effective service for these streets given resources, we have developed a triage system for addressing excessive speed on residential streets:

Low Volume Local Residential Streets
For local residential streets that are not "thru" or collector routes and/or where volumes are low (less than 1,000 cars per day), an education strategy is recommended. These streets would have a low priority for enhanced police enforcement and would generally not be eligible for installation of physical speed restraint devices.

Residents may request deployment of our S.M.A.R.T. unit (Speed Monitoring Awareness Radar Trailer) to assist in educating motorists as to the speed that they are traveling on neighborhood strets. DOT will deploy this unit on Secondary and Primary Residential roads and occasionally on two lane Arterial roads upon request. This until will be placed on the roadway for a period of a maximum of five (5) days, Monday through Friday, being placed for one direction on Monday, turned on Wednesday for the other direction and removed on Friday. This unit may be requested for a repeat schedule in three months as scheduling allows. It is our policy not to deploy this unit on weekends, holidays and from December 15th through January 2nd. To request this unit, please call 240.777.6000.

Moderate Volume Collector Streets
For residential streets that serve as "thru" or collector routes for the neighborhood and/or where volumes are moderate (1,000 to 4,000 vehicles per day), an education and engineering strategy will be applied. Where specific safety problems are identified by DOT or the police, enforcement may be enhanced.

Residents may request deployment of our S.M.A.R.T. unit as described above.

DOT will conduct a speed study to determine if speed and volume criteria are satisfied for consideration of engineering based counter measures. If excessive speeds are verified, DOT will work with the neighborhood to develop a traffic calming plan. The plan could include speed humps, small traffic circles, or other traffic control devices. Resident concurrence and citizen association endorsement will be required prior to implementation of a plan.

• Traffic Calming Measures
• Traffic Calming Devices 

Higher Volume Collector Streets
On higher volume (more than 4000 cars per day) residential streets, a combination of education, engineering and enforcement strategies will be used to reduce speeding.

DOT will conduct speed studies and an engineering evaluation to determine whether traffic calming devices or other traffic safety measures are justified. Resident and citizen association input will be used to develop a plan.

Enforcement will be enhanced in coordination with the above actions and where specific safety problems are identified.On residential streets classified as arterials in the Master Plan, traffic calming measures will not be installed which are inconsistent with the efficient movement of traffic or which interfere with the movement of emergency vehicles. Thus, speed humps will not be installed on arterial streets.