To close Interstate 5 through Southwest Portland this weekend, highway officials will shut down several freeway onramps in the metro area.

The closure of all northbound and southbound lanes between the Southwest Terwilliger and OR 99W/SW Barbur Boulevard exits will begin at 9 p.m. Friday and continue all hours and days through the weekend, with a planned reopening by 5 a.m. Monday.

Southbound traffic will be detoured at Southwest Terwilliger Boulevard, and northbound traffic will be taken off the freeway at the OR 99W/SW Barbur Boulevard exit.

In addition to the freeway closure these ramps will also close for the weekend (ramps will start closing before 9 p.m. to ensure the entire freeway is closed to vehicle traffic by 9 p.m. Friday, according to Don Hamilton of the Oregon Department of Transportation):

Northbound on-ramp closures:

• Southwest Kruse Way.
• Southwest Haines Street.
• Southwest Capitol Highway.
• Southwest Spring Garden Street.
• OR 99W/Barbur Boulevard.

Southbound on-ramp closures:

• I-405 on-ramp.
• South Harbor Drive on-ramp.

ODOT warns drivers of near certain long delays when traveling through the metro area that weekend. Drivers should choose alternate routes or pick travel times that occur during less congested hours including early morning and late evening.

Through traffic should use other freeways including interstates 205, 84, OR 217, and U.S. 26 to get around the four-mile closure.