If you’re planning to take southbound I-405 through Renton to get to the airport this weekend, prepare to use alternate routes or expect long delays. Traffic will be funneled into two lanes as crews close the southbound I-405 carpool lane between SR 167 and the West Valley Highway to pave the I-405 bridge over Oakesdale Avenue SW in Renton.

“Paving the bridge this weekend means we will stay on track to open an additional I-405 lane in each direction this fall,” stated Paula Hammond, Washington Transportation Secretary. “The added capacity on I-405 between the I-5 and SR 167 interchanges means faster speeds and smoother movements through the area around two of our state’s most congested interchanges.”

Crews are taking advantage of the good weather to complete the final stages on the new bridge over Oakesdale Avenue SW. Crews will be pouring concrete, which takes 42 hours to cure, in addition to paving, striping and cleanup work.

To complete this work, crews will close the carpool lane on southbound I-405 between SR 167 and SR 181 around the clock from 9 p.m. Friday, Aug. 28, to 5 a.m. Monday, Aug. 31.

Electronic message boards on I-405, I-5 and SR 167 will notify drivers of the upcoming closure.

The work is part of the I-405/I-5 to SR 169 Stage 1 – Widening Project. WSDOT and contractor crews are building a new lane in each direction on I-405 between I-5 and SR 167 and a new lane on southbound SR 167 between I-405 and SW 41st Street.