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Motorists beware: Macadam Avenue/I-5 ramps closed for two weeks

A major traffic connection in Southwest Portland closed for repairs Sunday for two weeks.

The Oregon Highway 43 (Macadam Avenue) ramps leading to Interstate 5 south, Lake Oswego, downtown Portland and the Ross Island Bridge were closed so Oregon's Department of Transportation can do repairs and upgrades. The work continues until Aug. 31.

According to ODOT, the long closure will allow the new concrete overlay to have time to harden before the ramp reopened to traffic. The new concrete is expected to be more durable, more impervious to water and last longer than the other concrete mixes.

About 15,000 vehicles a day use the section that is closed to reach downtown and the Ross Island Bridge.

Ramps affected:

• The northbound Macadam Avenue ramp to Southwest Kelly and Hood avenues.

• The northbound I-5 off-ramp (exit 299A) which leads to Macadam Avenue, southbound I-5, Lake Oswego, downtown Portland, and the eastbound lanes of the Ross Island Bridge.

• The westbound Ross Island Bridge ramp to Hood Avenue, which leads to southbound I-5 and Lake Oswego. Corbett Avenue will remain open.

Detours from westbound Ross Island Bridge to Macadam Avenue South:

• From Kelly Avenue, continue westbound to Southwest Arthur Street. Turn right on Southwest First Avenue and then turn right on Sheridan St. Turn right to Naito Parkway and take the exit to Macadam Avenue and Lake Oswego. Use the right lane to exit to Kelly Avenue. Continue southbound on Kelly and turn left on Curry Street. Turn right at Hood Avenue to Macadam Avenue South. (Follow the existing “OR43/Macadam Avenue – Lake Oswego” green guide signs on Naito Parkway and Kelly Street.)

Detours from Southwest Macadam Avenue:

• Enter the on-ramp to I-5 north and take Exit 300. Then take the OMSI/Central Eastside exit. Turn right on Southeast Water Avenue and then left on Taylor Street. Turn left on Southeast Grand Avenue. Turn left on Morrison Street to cross the Morrison Bridge. Exit to Naito Parkway southbound and turn left at Southwest Market Street to I-5 south.

Courtesy KOIN 6 News