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We will replace crumbling asphalt with concrete slabs at five overpasses on SR 520 between I-405 in Bellevue and West Lake Sammamish Parkway in Redmond. We will also repave the roadway.
To maximize our resources and limit interruptions to traffic, we try to repave roadways at just the right time. We try to catch roadways when they have some damage, but are not so damaged that they will require additional repairs. If we wait too long to repave, the damage to the roadway can lead to even greater costs. Learn more about WSDOT's pavement management program.
Project details: By the numbers
- Cost: $9.4 million
- Miles of paving: Nearly four miles (3.66 miles westbound lanes; 3.82 miles eastbound lanes)
- New connections: 10 new concrete slabs adjacent to five overpasses
- Daily commuters: Up to 112,000 combined east and west
- Weekends of work: Six to eight weekends of work where traffic will be down to one lane
- Nights of paving: 85 nights
- Drivers affected by weekend work: Up to 39,000 in one direction
- Years since last paving project: As many as 15 years in some areas. The carpool lane was built in 2000 and 2001.