SDOT is out with two traffic alerts that you might need to know about: First, the eastbound left lane of the Spokane Street/East Waterway Bridge on East Marginal Way will be closed 9 am-3 pm tomorrow for expansion-joint repair (the city describes the exact spot as “between the Spokane Street Swing Bridge and the on-ramp to the Spokane Street Viaduct“); then on Sunday, at the north end of the Alaskan Way Viaduct, the left-hand lanes in both directions of the Battery Street Tunnel will be closed 10 am-6 pm for drain-cleaning work. (Also a reminder, while we’re at it, that the Seafair Torchlight Parade is Saturday night, so downtown traffic will be restricted from late afternoon through late evening; looking further ahead, the four days of Blue Angels-related I-90 bridge closures will start a week from tomorrow.)