Showing posts from May, 2019

A different approach for an I-90 facelift near Ritzville

By Ryan Overton

While many construction projects around the state are just getting underway, crews are close to wrapping up work on I-90 between SR 21 and Ritzville. And on this project, we tried something a little different.

Stone Matrix Asphalt. No, it doesn't involve Keanu Reeves – though that would be amazing – but it's still pretty cool. But more on that in just a bit.

The last time this stretch of I-90 – covering about 10½ miles – had a full pavement grind and inlay of asphalt was 2002. There was some minor reconstruction work in 2008 but overall the highway has remained relatively unchanged for more than 15 years. You may have noticed more wear on the road in the past couple years, with some significant rutting and cracks causing the roadway to look aged.
Typically the pavement cycle for resurfacing is about every 10 to 15 years, so 17 years is longer than normal. To extend the life of this next pavement cycle, we're using Stone Matrix Asphalt, or SMA, for the driving…

Weekend-long lane reductions coming to Aurora Bridge

By Tom Pearce

Ah, another summer, another round of weekend-long lane reductions in Seattle for repaving. This year the closures will take place on the State Route 99 George Washington Bridge, aka the Aurora Bridge. It’s part of a larger preservation project that includes painting the bridge.

Our contract with Liberty Maintenance allows for paving for up to 10 weekends. These weekends include around-the-clock lane reductions on the bridge. This leaves just one lane open in each direction. The first lane reduction begin at 7 p.m. Friday, May 31, and will last until 5 a.m. Monday, June 3. Other weekend lane reductions scheduled so far are:
June 14-17June 28-July 1July 12-15Aug. 9-12, 16-19 and 23-26Bridge vs. land

Paving a bridge is different than paving on land. When there’s solid ground underneath, we can grind off the old pavement and leave it ground for a few days, then repave it a few nights later.

Bridges have layers – the Aurora Bridge has steel beams and stringers supporting the…

New signs on eastbound I-90 in Snoqualmie

By Nicole Daniels

If you regularly travel on eastbound Interstate 90 between Preston and Snoqualmie, you are probably aware of the frequent backups near the State Route 18 off-ramp during peak commute periods. Although construction to improve the I-90/SR 18 interchange is scheduled to start in 2021, we're continuing to implement low-cost improvements to manage congestion and improve safety in the interim.

Recently, contractor crews from Northeast Electric, LLC installed two new active warning signs on eastbound I-90 just west of the SR 18 off-ramp. The first sign is approximately two miles before the I-90/SR 18 interchange, and the second sign is about a mile before the interchange. These signs will be activated in summer 2019.

The signs are wired to automatically turn on when traffic ahead is slowed or stopped, giving drivers more time to slow down in order to prevent rear-end collisions.

Previous improvements
Like this sign, we've also implemented many other low-cost improvement…