In case you have late-night driving ahead on the north side of downtown: Highway 99 is reopening early. It’s been closed since 3 am Saturday between the Battery St. Tunnel and Valley St., but SDOT says the work is done and 99 is fully reopened, with surface-street closures ending shortly too. Heads up for a big overnight closure this week: I-5 northbound, Dearborn to Spring, will close 9 pm Tuesday to 4:30 am Wednesday for sign installation.