INDIANAPOLIS — Ramp metering began this week on I-465 on the southeast and east side of Indianapolis. Traffic signals will be in use at several ramps to improve traffic flow and safety along the busy corridor.
Ramp metering will be in use on I-465 between I-65 and I-70 during peak travel times. Ramp metering controls the frequency of vehicles entering the roadway to match traffic capacity through traffic signals at on-ramps.
When the meter is in use, signals cycle between red and green to indicate to motorists when to merge. When the light turns green, one car will merge onto I-465. The next vehicle on the ramp will wait until the red light turns green again to enter I-465.
When the meter is not in use, the signals will flash yellow, and merging will resume as normal. If the ramp gets full while the meter is in use, the signal will adapt to traffic conditions and increase the rate at which it allows vehicles to proceed onto I-465. Traffic signals are installed at each ramp meter location and are currently flashing yellow to help prepare drivers for the change.
Variable speed limits (VSLs) are expected to be introduced later this summer. Digital speed limit signs will be posted every half mile on both sides of I-465. Speed limits will be increased or decreased by five miles per hour to match traffic conditions. This will help reduce crashes and improve safety. The speed limit will be adjusted based on congestion, roadway incidents, work zones and inclement weather.
Additional dynamic message signs (DMSs) will also be in use on the corridor. The electronic signs provide drivers on I-465 with real-time traffic alerts and information to improve their commute. DMSs provide clear and immediate messages to drivers about road conditions, traffic situations and weather conditions.