While the last of four scheduled overnight closures on 99 should be getting under way now, the new edition of SDOT’s weekly lookahead is out and reveals some smaller-scale closures you might want to know about:

*9 pm Friday-5 am Monday: The right lane on NB 99 will be closed between S. Atlantic and Railroad Way S., along with the Royal Brougham Way onramp to NB 99. That’s so the onramp can be realigned.

*7:30 am-11 am Sunday: The St. Patrick’s Day Dash will close 99/Aurora Ave. N. between Fremont and the Battery Street Tunnel.

*Good news for the most dangerous intersection in West Seattle: Next Monday-Wednesday (March 17-19), around the clock, SDOT says: “Crews will close the right eastbound curb lane on Olson Pl. SW at 2nd Ave. SW to repair concrete panels. Traffic to 2nd Ave. SW will be detoured to Myers Wy. S.” (SEE FRIDAY UPDATE HERE)

*March 22 Viaduct closure: Earlier WSDOT announced a full-day Alaskan Way Viaduct closure to follow up on this month’s inspection. The lookahead has it penciled in for 4:30 am-7 pm that day. It will be preceded by an extended overnight closure just north of the Viaduct, SB 99 closing between Valley St. and the Battery St. Tunnel for bridge-girder work, 11 pm March 21 to 10 am March 22.