The delays are really bad in the skateboard world..., most of the shippers/receivers only load and unload between 7 and 3, and average deadhead is further for the flatbed market than reefers and dry van. It's a real balancing act sometimes to get unloaded in a timely manner so you can deadhead to your pickup before they close up shop. Pretty much any delay costs you half a days revenue, which is a hard hit. I have no doubt half the trucks getting caught in these snowy pile-ups are only on the road because of that clock. You can't just stop a few hours to let the storm pass and then start earlier than normal to make up time. So everybody pushes on despite the road conditions.