Look out for a snag in the shadow of the Space Needle this weekend (and next). Both directions of hearty Highway 99 south of the Battery Street tunnel, and a good portion of Mercer Street will remain off-limits to traffic Friday night through Monday morning for Mercer widening work.

Broad Street and the I-5 on- and off- ramps at Mercer Street will remain open during the weekend work at no extra charge. See the deal.