I can't see what is causing this horrible standstill but I'm guessing it's a car accident....[...]

MM 123 standstill 1 hour and counting [...]

Standstill traffic[...]

stand still[...]

Standstill for 15 mins thus far. No sign of moving anytime soon. [...]

There has been a big accident that I truck driver drove into a barrier from the other side of the road luckily he is OK.[...]

Have been stopped for almost an hour believe its a accident and 40 isnt open up [...]

Traffic. Hwy patrol driving away from traffic on shoulder against traffic[...]