| Traffic Signal Design |
 Wells + Associates provides 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:
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Assign right-of-way |
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Provide for an orderly movement of traffic |
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Increase intersection and roadway capacity |
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Reduce frequency and severity of certain accident types |
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Interrupt heavy traffic at intervals to permit vehicular and pedestrian traffic to cross |
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Facilitate effective and efficient progression of traffic along an arterial street network |
Wells + Associates coordinates signal design requirements for a project with the appropriate jurisdiction. |
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Our plans typically include:
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Location of poles, signal heads, and controllers |
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Phasing diagram/timing chart |
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Cable and conduit runs |
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Specifications and standards |
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Loop wire and video vehicle detector systems |
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Interconnect cable plans |
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Color sequence and clearance charts |
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Wiring diagrams |
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Pavement markings and signage plans |
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Special notes |
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Materials summary |
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Probable engineer’s cost estimate to facilitate the bidding process |
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Solicitation of bids from contractors |
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Bid evaluation/contractor selection |
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Other signal related tests include:
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Computer modeling using Synchro/SimTraffic software |
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Traffic signal warrant studies |
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Development of signal timing plans |
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Signal optimization |
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Time-space diagrams |
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Corridor progression evaluations |
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| Plan Approval: |
Wells + Associates works with the appropriate public agency staff to secure plan approval in a timely fashion. Wells + Associates has successfully prepared and secured approval for traffic signal plans in many jurisdictions including:
Maryland:
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Anne Arundel County |
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Howard County |
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Montgomery County |
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Prince George’s County |
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City of Annapolis |
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City of Rockville |
Virginia:
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Arlington County |
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Fairfax County |
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Loudoun County |
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Prince William County |
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Spotsylvania County |
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Culpeper County |
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Town of Leesburg |
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City of Alexandria |
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City of Richmond |
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