DOT fail for trolley brake not working?

Not sure what I would do without it? That's what I use when I jump out to look down driverside of trailer to see if I'm going to hit the hole on a blindside

 

A friend of mine ran over his own foot doing that.

 

New trucks don't have them because they add $20 to the price of a $150k rig. That's just too much money just to make a driver's life easier.

 

Not sure how that's even possible but will take your word for it. lol

 

New trucks have them. It's usually the company that's buying them that doesn't trust their drivers with one that has it removed as an option. And from what I see out there, can't say I blame them.

 

He was coming out of the woods with a load of logs and stopped to tighten his wrappers. He pulled the hand valve down, as was his habit, and walked toward the back of the trailer.
For whatever reason the handle valve vibrated back to the off position. They'll do that sometimes.
The driver was wiping mud off of his taillights.
The truck was parked on a slight upgrade and when it started to move the driver tried to jump clear but tripped and fell down. The left trailer tires ran over his foot. He was lucky it was just his foot. The truck continued down the hill backwards, picking up speed, until it came to a turn in the road and continued straight off the edge and down a fifty foot drop. It was totalled.
The next truck out found the driver laying in the road, called for help, and he was taken to the hospital. His left foot was amputated.
He's back driving again but now when he gets out of the truck he sets the parking brake. Like you're supposed to.