Ramp metering system begins operation on I-74

Posted by Trina Edwards - email

CUMMINSVILLE, OH (FOX19) - The Cincinnati area's first ramp metering system activates Tuesday.

The ramp metering manages traffic flow by breaking up platoons of vehicles, enabling motorists to more easily merge into traffic. At each ramp, the system utilizes a green and red traffic signal; the ramp meter releases one vehicle at a time, creating gaps for vehicles to merge onto the highway. At each ramp is a sign indicating "Ramp Metered When Flashing."

Officials say studies show that this system can reduce crashes, improve travel speeds and create a more uniform traffic flow.

The ramp meter system will operate from 6 a.m. to 9 a.m. at the ramps from North Bend, Montana, Colerain/Beckman and Spring Grove to eastbound I-74.

The lights are activated by a set of sensors embedded in the pavement on the ramps and on the freeway near the ramps that register a passing vehicle. This information is used to adjust the rate at which the meters operate.

For two-lane ramps, the left lane obeys the signals on the left side of the ramp and the right lane obeys the signals on the right side. The lights will release one vehicle from the left and then one from the right. The second vehicle in line must come to a stop.

For single lane ramps, one vehicle is released per green light. Again, two vehicles are not permitted to proceed through on the same green.

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