Thursday, June 1, 2017

Big changes come Monday, June 5 for I-90 drivers across Lake Washington

By Annie Johnson

If you travel I-90 between Seattle and Bellevue you're hopefully aware of our joint project with Sound Transit to add new HOV lanes to I-90 which will enable Sound Transit to build their East Link light rail extension across I-90 to Redmond. It's been a long process that started back in 2006 when we built a new westbound HOV lane between Bellevue Way and 80th Avenue SE on Mercer Island. In 2012 we opened the new HOV lane in the eastbound direction between Mercer Island and Bellevue.

Over the past 2.5 years we've been working on the final stretch of new HOV lanes between Mercer Island and Seattle. A lot of that work has been taking place off the roadway and mostly out of view of drivers but it will all come into view this weekend when we open the new HOV lanes and permanently close the express lanes.
A before and after look at I-90 across Lake Washington. Cones are in place in the new westbound
HOV lane. HOV lanes will open in both directions on Sunday, June 4.

What's the plan this weekend?
At 9 p.m. Friday, June 2, all eastbound I-90 traffic will be reduced to one lane. For most of the night eastbound traffic will remain in the express lanes while crews do one last night of testing systems in the tunnels, unveiling signs, and lane striping on the eastbound I-90 mainline. Early Saturday morning crews will switch the express lanes to the westbound direction one final time. Eastbound I-90 will remain reduced to one lane near Rainier Avenue while crews restripe the area near the eastbound entrance to the express lanes. This is an area crews can't reach when the express lanes are open eastbound so we'll be out there bright and early to do this striping before fully opening the eastbound roadway and the new HOV lane by 9 a.m. Saturday.

From 9 p.m. Saturday until 9 a.m. Sunday, westbound traffic will be reduced to one lane as we repeat Friday night's work but in the opposite direction. If you want to take one last drive in the I-90 express lanes for sentimental reasons I'd suggest doing so by 4 a.m. on Sunday. Around that time crews will begin to shift traffic back to the westbound mainline and permanently close the express lanes to vehicle traffic. However, westbound I-90 will remain reduced to one lane west of the Mount Baker Tunnel as crews restripe the area near the westbound exit from the express lanes. We expect to finish the work and reopen the westbound mainline by 9 a.m. Sunday.
Left: Crews have been working on re-striping I-90 across Lake Washington to put new HOV lanes in both directions in place before the express lanes are handed over to Sound Transit. Right: New signs will be unveiled this weekend as part of our project to introduce new HOV lanes on I-90 across Lake Washington while closing the express lanes for good.

What can I expect Monday morning?
How exactly these changes will impact your commute depends on a number of things including the time of day you travel and where you're going. You can find detailed information about the changes in an earlier blog. No matter what, you should definitely expect a period of adjustment. This is a big change for everyone that uses I-90 across Lake Washington. It could take months for traffic to settle into its new routine.

As we normally do, we'll be keeping an eye on things and doing our best to keep you informed of what's happening out there. Before you hit the road, take a minute to look at your commute with our WSDOT traffic app or check out the WSDOT traffic Twitter feed.
Upgrading systems in the I-90 tunnels has been a major component of our Two-Way Transit and HOV project.

What happens after this weekend?
Over the next few weeks our contractor crews will continue working to hand over the I-90 express lanes to Sound Transit as they gear up for light rail construction on I-90. Our work includes removing the existing overhead signs for the express lanes and placing barrier to permanently close the express lanes to traffic. There's always work to finish up even after a project opens to traffic so expect nighttime lane and ramp closures this summer. You can always find the latest information about I-90 lane and ramp closures in King County on our I-90 and SR 520 construction closures website.

Sound Transit's work on the bridge will begin with surveying, concrete work to prepare for future post-tensioning work at the East approach to the bridge, and relocating existing electrical equipment inside the bridge pontoons. For updates on Sound Transit's progress on this and other projects, visit The Platform blog.