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Traffic Signals


Under the SignOps program, Office of Traffic Operations works closely with state and local traffic engineers to optimize traffic signals across the state. Using the latest technology and signal timing methodology, the SigOps team monitors and optimizes traffic flow to provide a more efficient and safer commute for the public. SigOps focuses on two primary areas:

Signal Optimization

Georgia DOT provides a multi-jurisdictional, cutting-edge signal optimization with the goal of improving traffic flow and reducing vehicle emissions through improved signal timing.

Signal Operations

Georgia DOT provides operational and maintenance support for traffic signals statewide.


 Other Program Areas

Performance Measures
Technology and Innovation
Flashing Yellow Lights

Flashing Yellow Arrows

Georgia DOT is now installing four-section Flashing Yellow Arrow (FYA) signals across the state. This traffic signal includes a flashing yellow arrow that means drivers can turn left after yielding to oncoming traffic and pedestrians (oncoming traffic still has the green light).

Report Traffic Signal Outage


Regional Traffic Operations Program

The Regional Traffic Operations Program (RTOP) is a multi-jurisdictional, cutting-edge signal timing program with the goal of improving traffic flow and reducing vehicle emissions through improved signal timing.


Regional Traffic Signal Operations

GDOT manages a RTSO program focused on providing operational and maintenance support for traffic signals outside of the Metro Atlanta area defined in RTOP


Signal Maintenance

State Signal Maintenance

Learn how to be added on the statewide signal maintenance contract – for vendors

Traffic Signal Guidelines

Traffic Signal Design Guidelines

Access traffic signal standard operating guidelines

Technology and Innovation

Connected Vehicles

Connected Vehicles

New technology that will enable cars, buses, trucks, trains, roads, and other infrastructure, and our smartphones and other devices to “talk” to one another.


Qualified Products List (QPL 48)

A listing of Traffic Signal & ITS Equipment prepared in accordance with the Office of Traffic Operations Standard Operating Policy 42 (SOP 42).


Qualified Products List (QPL) Requirements

A list of requirements for Georgia DOT’s current QPLs.

Performance Measures


Automated Traffic Signal Performance Measures (ATSPM)

The ATSPM software is open-source software that GDOT has adopted and modified for their use. ATSPM show real-time and historical functionality at signalized intersections.


SigOps Metrics

MARK was developed, based on open-source code, to track signal performance measures such as throughput, arrivals on the green, queue spillback rate, split failures, and travel time metrics.


Regional Integrated Transportation Information System (RITIS)

RITIS is an automated data fusion and dissemination system that provides an enhanced transportation network view for overall traffic system performance and trends as well as perform bottleneck and trend analyses for new signals.