Lane closures at the Interstate 70 Eisenhower-Johnson Memorial Tunnels are expected to continue through the spring and summer, according to the Colorado Department of Transportation.

Full overnight westbound closures of the tunnel with alternating traffic using the eastbound tunnel will reportedly continue from 10 p.m. to 6 a.m. every day through Thursday, May 9, the transportation department said in a news release.

The full overnight westbound closures of the tunnel will then resume Sunday, May 12, through Thursday, May 16, from 10 p.m. to 6 a.m., the release states. 

When the westbound tunnel is closed, traffic along both directions of I-70 will be stopped at the tunnel entrance while one direction of traffic is escorted through the tunnel, according to the news release. Traffic stops will reportedly last for about 20 minutes, and delays are expected to be minimal due to the overnight working hours.

Over the summer there will be more work that will require overnight single lane and full tunnel closures with alternating traffic through the open tunnel, according to the transportation department. Work will take place Sunday through Thursday nights, and there are no planned closures over weekends or holidays, the release states. The latest updates will be posted on CoTrip.org.

The projects ongoing at the I-70 tunnels include improvements to drainage, fire department hose connections, freeze protection, signage and security upgrades, and repairs to the tunnel liner to decrease water intrusion, the release states.

While closures are in place in May, maintenance crews will wash the tunnel walls, clean the drains, sweep the pavement and other clean-up to improve road conditions prior to the summer driving season, according to the release.