Staying on the Right Track  Electronic Stability Program (ESP)
is the system that sets things right when a truck is about to
lose its grip on the road and either skid or roll over. ESP
counteracts the forces that tend to drive the truck off the
road, through interaction between the truck's Electronic Brake
System, engine management system and retarder, and the trailer's
braking system.   The ESP is highly effective in potentially
dangerous situations like:    • Obstacle avoidance maneuvers
with sudden steering input (e.g. steering from the shoulder back
on the road and skidding)