The taco-truck owner, Thomas Lopez, said that the truck and his three employees were headed to South Lake Union to serve lunch before the tanker crashed.
The tanker truck rolled over on the freeway, around 10 am, and caused a 8 hour traffic stop, The crash closed the freeway in both directions between Interstate 90 and the West Seattle bridge for about eight hours, causing traffic congestion to spill over to surrounding streets, creating massive gridlock.
http://www.seattletimes.com/seattle-news/transportation/semi-rollover-on-i-5-near-west-seattle-bridge-blocking-lanes/
http://www.seattletimes.com/seattle-news/taco-truck-stuck-in-seattles-big-i-5-closure-opens-for-lunch-anyway
top photo by Rachel McQuade