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Macadam ramp closures coming

Interstate-5, Ross Island Bridge, Hood and Kelly avenues impacted by road work

The OR 43 (Southwest Macadam Avenue) ramps leading to southbound Interstate 5, Lake Oswego, downtown Portland and the Ross Island Bridge will close for more than two weeks in August. Travelers should plan ahead and expect delays during the Aug. 14-31 closure for paving and upgrades.

The closure is needed because rebar is showing through the deck in some sections. Replacing the deck now is far less costly than waiting for further deterioration, when a complete replacement might be necessary. The concrete requires sufficient time to harden before traffic can return.

The closures will begin Sunday, Aug. 14 and will continue around the clock through Wednesday, Aug. 31. The schedule may change depending on the weather and other uncertainties.

The ramps affected are:

  • Northbound OR 43 (Southwest Macadam Avenue) ramp to Southwest Kelly and Hood avenues.
  • Northbound Interstate 5 off-ramp, exit 299A, leading to OR 43 (Southwest Macadam Avenue) n Southbound I-5, Lake Oswego, downtown Portland and the eastbound Ross Island Bridge
  • Westbound Ross Island Bridge ramp to Southwest Hood Avenue, which leads to southbound I-5 and Lake Oswego.
  • Southwest Corbett Avenue will remain open.

    Additional night closures of these ramps may be necessary in the days before and after the Aug. 14-31 full closure.

    A series of interactive maps outlining numerous detour routes with turn-by-turn directions can be found by visiting the project web site, www.OR43ramp.com.

    As part of the project, ODOT will also replace a damaged traffic barrier and repave a section of roadway that connects to Southwest Hood Avenue.

    During the closure, people on foot and on bike may continue to use the Gibbs Street Pedestrian Bridge over I-5, just south of the Ross Island Bridge. The pedestrian bridge is unaffected by this project.