WSDOT plans to close northbound I-405 in Bellevue from 8th Street to SR 520 October 1-2 to install braided ramps, weather dependent
WSDOT will build new multi-level "braided" ramps to separate vehicles entering and exiting northbound I-405 between NE 8th Street and SR 520 in Bellevue. Here's a diagram of how the "braided" ramps work to separate traffic. This project will add a bypass lane for I-405 traffic headed eastbound to SR 520. A new ramp from the NE 10th Street overpass will give drivers direct access to SR 520 from downtown Bellevue.
The NE 10th Street bridge will eventually act as an anchor for ramps connecting downtown Bellevue directly to SR 520 as part of the Bellevue Braids project. Some of the bridge railings on the new bridge will be removed when the ramp is connected to the bridge and then reused on other projects or used as replacement parts if the railings become damaged.