Seattle Times transportation reporter

Westbound Highway 18, one of the state’s busiest routes on warm weekends, is closed from Interstate 90 to Issaquah-Hobart Road for 2 miles of paving, which is expected to last until 5 a.m. Monday.

This is the second weekend of five planned ramp closures at or near Exit 25 where I-90 meets Highway 18, as the Washington State Department of Transportation continues with interchange reconstruction, widening of a dangerous stretch of Highway 18 to four lanes, and fish-passage projects.

A new asphalt layer is also being applied this spring, as contractors near the finish line of the four-year, $188 million project.

A more localized closure, affecting just the interchange, is scheduled at 9 p.m. Friday, May 8, until 5 a.m. Monday, May 11, blocking ramps and lanes from eastbound I-90 to westbound Highway 18.

Similarly, on the following weekend, ramps will close from both Highway 18 and Snoqualmie Parkway to eastbound I-90 from 9 p.m. Friday, May 15, until 5 a.m.…