Weather conditions over the coming weeks will determine whether crews can this year finish an exit ramp from the east end of the Senator George Sellar Bridge onto the new Grant Road Bypass, behind Fred Meyer.
Rainy conditions have slowed the construction schedule for the project.
The offramp will allow motorists eastbound over the bridge to exit onto the bypass without passing through the busy intersection at Sunset Highway and Grant Road.
When the ramp is finished, motorists will always have the option to head south via the bypass or the intersection.
The bypass opened in September to southbound traffic on Sunset Highway. The ongoing work is part of $65 million in improvements to speed traffic flow around and over the bridge. Everything should be finished by spring or fall 2013.