Mission

As DDOT is charged with providing a safe transportation system by maintaining a high quality traffic control system, including traffic signals and street lights, DDOT shall:

regularly evaluate the need for adjustments to traffic signal timing to minimize unnecessary automobile idling.
review timing on pedestrian signals to ensure that adequate time is provided for crossing, particularly for locations with a large elderly population.
place and maintain traffic control devices on all District streets and highways as necessary to regulate, warn, or guide traffic.

Procedures & Services

Residents may request traffic signal issue investigations by calling the Mayor's Citywide Call center at 311, or visiting 311 Online, and submitting a request.

Traffic Signal FAQs

HAWK Pedestrian Signal Guide

Energy Savings Initiatives - LED Traffic Signals, Uninterruptible Power Supply (UPS), and Signal Optimization

DDOT shall adopt the Federal Highway Administration's (FHWA) Manual on Uniform Traffic Control Devices (MUTCD) as the official standard for traffic signs, traffic signals, pavement marking, and traffic control devices. (DCMR 18-2100).

See Related

Page:

Traffic Signs (Compendium)
Page:

Traffic Signals (Compendium)
Page:

Traffic Calming (Compendium)
Page:

Traffic (Compendium)

Additional Information

Legal References

DCMR 10-A410.9: Action T-2.4.A: Pedestrian Signal Timing
DCMR 10-A411.16: Action T-2.5.B: Signal Timing Adjustments
DCMR 18-21: Traffic Signs, Signals, Symbols, and Devices

Design Standards & Specifications

DDOT Design and Engineering Manual, Chapter 40: Traffic Signal Design
DDOT Guidelines on Vehicular and Pedestrian Interval Calculation
Manual on Uniform Traffic Control Devices (MUTCD)

Transportation Plans & Studies

The District of Columbia Traffic Signal System: 1971 to 2011

Other Resources

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	File	Modified
Labels No labels Preview View	PDF File Energy Savings Initiatives.pdf	26 Mar, 2022 by James Graham (Deactivated)
Labels No labels Preview View	PDF File Hawk Pedestrian Signal Guide.pdf	26 Mar, 2022 by James Graham (Deactivated)
Labels No labels Preview View	PDF File Traffic Signal FAQs.pdf	26 Mar, 2022 by James Graham (Deactivated)

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