Highway tunnel in Seattle opens to traffic
The Alaskan Way Viaduct replacement tunnel, also known as the SR 99 Tunnel, is a bored highway tunnel in the city of Seattle, Washington, United States. The 2-mile, double-decker tunnel carries a section of State Route 99 under Downtown Seattle from SoDo in the south to South Lake Union in the north. The first full day of tunnel operations saw lower traffic volumes, with only 22,145 vehicle trips, due to an ongoing snowstorm, as well as confusion at the left-side exits.