The Seattle Department of Transportation's weekly transportation construction update highlights the projects and events that may impact travel through the Seattle area. View this week's update.

This week's highlights: 

• April 18 - 21: night time lane closures on northbound and southbound SR99 while crews install sign structures.
• April 22 - 25: SR520 closed between Montlake and Bellevue while eastbound traffic is switched to the new floating bridge.
• April 23 - 24: Full closure of 23rd Ave. and E . Union St. intersection.
• April 29 - May 12: SR99 Viaduct closed for up to two weeks between S. Spokane St. and the Battery Street Tunnel.
• April 30: March of Dimes March for Babies will close streets in Downtown and South Lake Union; Mariners and Sounders have games at Safeco and CenturyLink Fields.

Please note: The information is subject to change and additional construction or events may be planned in the Seattle area.

If you have questions, contact construction.coordination@seattle.gov or call 206-684-ROAD.