(COLORADO) — The warning period for crossing the solid lines of Colorado's express lanes in the Central 70, I-25 South Gap and US 36 corridors will soon expire and drivers will instead receive fines, known as "civil penalties" beginning on Jan. 1, 2025, according to the Colorado Department of Transportation (CDOT). It comes as a new roadside detection system is rolled out, which identifies weaving vehicles using sensors, cameras, and software. It was first introduced in Colorado last year on the I-70 Mountain express lane corridor and has since been expanded to the C-470 and North I-25 express lanes. "Beginning Dec. 1, the remainder of Colorado’s actively tolled express lanes will adopt the system, which includes I-70 between I-25 and Chambers Road, I-25 between Monument and Castle Rock, and US 36 between Federal Boulevard and Table Mesa Drive," according to CDOT. Beginning Dec. 1, 2024 drivers in these areas will begin receiving a warning for entering or exiting the express lanes outside designated areas. "The enforcement will begin with a 30-day grace period, during which warnings will be mailed to the registered address of the vehicle," CDOT explained. "Starting Jan. 1, 2025, the warning period will end, and violators will receive fines known as civil penalties." According to CDOT, drivers who weave in and out of express lanes and general purpose lanes cause crashes every year, and discussed the impact so far from the roadside technology's rollout. "This technology has already reduced violations by 80% in the corridors where we’ve deployed it," said Tim Hoover, a CDOT spokesman. "This means accidents avoided and lives saved." CDOT reminded drivers that they should only enter or exit express lanes at clearly marked points with signs and dashed lines. "More than 90% of drivers using express lanes follow the rules and don’t cross the solid lines. Unfortunately, the small percentage that do weave endanger themselves and everyone else," said Hoover. "Starting Dec. 1, we’re giving these drivers 30 days notice to change their behavior. After that, if you cross the line, you pay the fine." Civil penalties, according to CDOT, start at $75 if they are paid within 20 days, after that, the fine increases to $150.