Drivers should plan for delays this weekend on State Route 900 – Sunset Highway – east of Interstate 405 in Renton.

Crews working for Washington state Department of Transportation will close lanes on the highway to hook up new drainage pipes to a catch basin.

At 10 p.m. on Friday, crews will close both westbound SR 900 lanes between Sunset Boulevard Northeast and Edmonds Avenue Northeast and funnel one lane of westbound traffic and one lane of eastbound traffic into the two eastbound lanes. Crews will also close one lane of westbound State Route 900 between Sunset Boulevard Northeast and I-405. All lanes will reopen by 5 a.m. Monday.

Traffic in the area could get especially heavy because of hot weather forecast for the weekend and the proximity of Lake Washington to the work site, according to state officials.

Boaters and beachgoers heading to Gene Coulon Memorial Beach Park on the other side of I-405 and other drivers should budget at least an extra five to 10 minutes into their trips.

In this state project crews are replacing corroded drainage pipes that have caused sinkholes on SR 900. The state must replace the pipes or risk additional sinkholes and roadway failures.

Crews are also repaving the highway between I-405 and Harrington Avenue Northeast. The state expects to complete the project this August.