jackie ward reports. >> reporter: that's right. traffic behind me may look like it's moving slowly right now but it's actually flying compared to how it was after this morning. a big rig caused a major traffic jam. >> reporter: employers in the east bay had to practice extra patience this morning. thousands were stuck on 680 after a big rig blew a tire and hit a concrete barrier and burst into flames. it turned into a two-hour commute instead of 20 minutes. >> people were stuck in traffic. we said just get here when you can. another associate called and i said to work from home. >> reporter: its diesel fuel tanks erupted engulfing the truck in flames. this person was about to drive his son to school and quickly had to find a different route. >> it was a mess. i have never seen anything like this. it's the worst traffic i have seen on that road. >> reporter: but only four people complained of minor injuries according to chp officials. >> you can't really predict what's going to happen. but when it does, luckily, drives were paying a