Drivers traveling through Federal Way this weekend should expect delays.
The state Department of Transportation will be closing all lanes of southbound Interstate 5 at state Route 18 by 11 p.m. Friday and Saturday nights. They will reopen at 7 a.m. each morning.
The closures are to allow crews to begin installing large steel girders over I-5 for two new flyover ramps. Cranes will be used to lift the girders into place.
Other closures for the weekend include two northbound I-5 lanes near SR 18. The first lane will close at 8 p.m., the second lane will close at 9 p.m. and both lanes will reopen at 6 a.m.
The ramp from westbound SR 18 to southbound I-5 and the ramp from southbound I-5 to eastbound SR 18 will also close from 9 p.m. to 6 a.m. Friday and Saturday.
Traffic will be detoured onto S. 348th Street to southbound Highway 99, then to 54th Avenue East in Fife before getting back on I-5. Police will direct drivers at major intersections.