Crews will begin widening a busy Interstate 5 off-ramp to Federal Way this week.
The southbound I-5 off-ramp at South 320th Street will be widened from three to five lanes. The expanded ramp will include two left-turn lanes and three right-turn lanes.
More than 15,000 vehicles use the ramp each day. Workers with the state Department of Transportation and the City of Federal Way will construct the $5.1 million project, funded by the city and a federal grant.
“This ramp leads to the city’s downtown core, but it’s a frequent choke-point, especially on weekday afternoons,” said Cary Roe, Federal Way’s public works and parks director.
Drivers can expect occasional weeknight ramp closures during construction.
Crews will widen the ramp to the west and build a retaining wall to support the hillside, the transportation department said. The crosswalk across the southbound I-5 on-ramp will be relocated to the north side of South 320th Street.
Workers will build a pedestrian island in the middle of the new crosswalk and also will improve lighting and modify signal-timing to keep traffic moving.
The construction, scheduled to be finished by the end of September, is one of two projects underway to improve access to and from I-5 in Federal Way.