Last Driven September 2017 MP: .46 Location: South of downtown Tacoma, Tacoma WA As we exit downtown, we get a BGS notifying us that we are approaching a junction with I-5 and SR 7. MP: .26 Location: Near Tacoma Dome, Tacoma WA The road splits, and what is technically I-705 heads up the northbound ramp … Continue reading Interstate 705, SR 509 to I-5/SR 7