Work on the blue bridge will slow traffic today and Wednesday on Highway 395.
The state is placing LED lighting, which it says is longer lasting and more energy efficient, on the bridge.
The state Department of Transportation will close the Lewis Street on-ramp and close the highway's right southbound lane between 9 a.m. and 3 p.m. today.
That will reopen Wednesday, but the Columbia Drive on-ramp in Kennewick will close, along with the right northbound lane.
The agency says signs will be in place to help direct drivers through the construction.