The average weight of a motorcycle plus its rider is close to 1000 pounds. A tractor-trailer rig can weigh as much as 80,000 pounds. Given this vast difference between the two vehicles, a motorcycle collision with a truck is unthinkable. The tractor-trailer’s enormous size limits the trucker’s view of the space around his vehicle as well as his braking and steering. This means it’s very difficult for himĀ to see you, and hisĀ options for evading you are limited. In short, your safety around semi trucks is up to you. Motorcycle Safety.