Traffic Signal Design

We provide traffic signal design services to all public & private agencies

We provide a full range of traffic signal planning and design services to public agencies, private real estate developers, and others.

Traffic signals and signal systems have the following advantages:

• Assign right-of-way
• Provide for an orderly movement of traffic
• Increase intersection and roadway capacity
• Reduce frequency and severity of certain accident types
• Interrupt heavy traffic at intervals to permit vehicular and pedestrian traffic to cross
• Facilitate effective and efficient progression of traffic along an arterial street network

Our traffic signal designs typically include:

• Location of poles, signal heads, and controllers
• Phasing diagram/timing chart
• Cable and conduit runs
• Specifications and standards
• Loop wire and video vehicle detector systems
• Interconnect cable plans
• Color sequence and clearance charts
• Wiring diagrams
• Pavement markings and signage plans
• Special notes
• Materials summary
• Probable engineer’s cost estimate to facilitate the bidding process
• Solicitation of bids from contractors
• Bid evaluation/contractor selection

Other signal related tests include:

• Computer modeling using Synchro/SimTraffic software
• Traffic signal warrant studies
• Development of signal timing plans
• Signal optimization
• Time-space diagrams
• Corridor progression evaluations

We work with the appropriate public agency staff to secure plan approval in a timely fashion. We have successfully prepared and secured approval for traffic signal designs and traffic control plans in many jurisdictions including:

Maryland:

• Anne Arundel County
• Howard County
• Montgomery County
• Prince George’s County
• City of Annapolis
• City of Rockville

Virginia:

• Arlington County
• Fairfax County
• Loudoun County
• Prince William County
• Spotsylvania County
• Culpeper County
• Town of Leesburg
• City of Alexandria
• City of Richmond