![]() The traffic signals will cycle every 4-8 seconds so that vehicles will only have to stop briefly before being allowed to enter into the tunnel.ĬDOT hopes that this continuous flow metering with only brief stops will reduce the delays caused by traditional metering. ![]() The traffic signals will be used to alternate lanes of traffic in an effort to more efficiently regulate the flow of traffic into the tunnel. When metering becomes necessary, as traffic approaches the tunnel, it will be spread into four lanes with traffic signals located above each lane. This method is similar to the ramp metering method used in the Denver metro area and other congested areas. This method is used in other states like California and New Jersey. Instead of just stopping all traffic, CDOT will be trying a new method of metering traffic. Traffic is stopped for 15-20 minutes at a time on average but it can take much longer for the end of the traffic queue to get moving again. When metering is underway, CDOT stops all traffic from entering the tunnel. As there are no shoulders in the tunnels, emergency vehicles must be able to respond to an accident, fire or medical emergency and they can’t get through when traffic is at a standstill. When traffic backs up into the tunnel, CDOT stops all inbound vehicles from entering the tunnel until the back-ups clear. Background:įor the past 25 years, CDOT has metered traffic at the Eisenhower Tunnel when traffic volumes exceed of the capacity of the highway or when an accident or inclement weather causes traffic to come to a standstill, backing up into the tunnel. Traffic signals will be used to create four lanes of eastbound I-70 on the west side approach to the tunnel tunnel allowing CDOT to better control the flow of traffic entering the tunnel. This new method of metering traffic is similar to the traffic signals located at on-ramps that regulate the flow of traffic entering the highways and Interstates in the Denver metro area. The Colorado Department of Transportation will be testing a new way of metering traffic during congested periods at the Eisenhower Johnson Memorial Tunnels.
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