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Chattanooga Traffic Data Shows Drivers Losing 26 Hours Yearly to Congestion
State records and city figures detail truck volumes at key interchanges alongside technology upgrades and transit options.
How we reported this
Chattanooga drivers lose an average of 26 hours per year stuck in congestion, according to the Tennessee Department of Transportation coordinated plan. The figure ranks the city second-worst for traffic delays in the state and ties directly to more than 20,000 daily trucks crossing the I-75/I-24 interchange.
The numbers matter because the city sits at the intersection of Interstates 24, 75 and 59, funnelling freight through a single choke point that affects both local commuters and through traffic. City documents note that the volume produces repeated slowdowns on routes that serve residential neighborhoods and industrial zones alike.
Smart technology counts
City records list a $4.5 million initiative funded by the Federal Highway Administration’s ATTAIN program that installs LiDAR sensing technology at 86 downtown intersections. The Chattanooga Smart Community Collaborative has raised more than $115 million for related mobility projects, including traffic accident prediction models. A separate upgrade placed Gridsmart GS3 Fisheye Camera Vehicle Detection Systems along corridors and completed a major signal retiming on Highway 153 in late 2025.
The city also operates a municipally owned fiber-optic network that connects sensors across a 100-intersection corridor. Officials use Google Cloud’s AI platform, including BigQuery and Gemini tools, to process crash data and support real-time traffic monitoring.
Transit and bike-share figures
The Chattanooga Area Regional Transportation Authority runs between 15 and 17 fixed bus routes plus a free Downtown Electric Shuttle that loops past the Chattanooga Choo Choo and Tennessee Aquarium. Bike Chattanooga, the first citywide bike-share system in the South, maintains more than 300 bikes at 40-plus locations and connects to a 23-mile riverwalk and one of the nation’s longest pedestrian bridges. The Chattanooga Metropolitan Airport offers direct flights to eight cities, including Atlanta, Chicago and Washington, D.C.
Residents can check current signal timing updates and CARTA schedules on the city’s transportation planning site or download the Bike Chattanooga app to locate available bikes before peak commute hours.