Adaptive Computerized Signalization System

What are adaptive signals? 

Conventional signal systems use pre-programmed, daily signal timing schedules. Adaptive signal control technology adjusts the timing of red, yellow, and green lights to accommodate changing traffic patterns and ease traffic congestion.  It works by collecting current demand information, evaluating performance using system specific algorithms, and then implementing modifications based on the outcome of that evaluation in real time. 

The Adaptive signals project started in 2015 and has been completed in multi phases.  

• Phase 1 was completed in 2018
• Phase 3 was completed in 2020
• Phase 2 was completed in 2022 

All these systems together total 47 adaptive signals reaching along the major corridors in Lexington and into parts of West Columbia. The more signals that are adaptive the better they can work together to create more efficient traffic flow.

What are the cameras I see on the signals? Are they to catch speeding? Are they tracking my personal information?

The cameras mounted on the signals are not a surveillance system.  They do not have “night vision”. They are used for detecting and monitoring traffic flow for the Adaptive program. It is the system's way of “seeing” the cars to adapt accordingly and ensure the proper cycle is served to vehicles in the queue.  They are not taking any still photos to catch speeders.  State law prohibits using the data for such violations and it erases after 72 hours.

Benefits of Adaptive Signals: 

• Eliminates constraints on current signal operations and timing
• Improves travel time
• Operates signal "intelligently"
• Reduces accidents
• Reduces fuel consumption and emissions