Technical Bulletins


  • Tractor
  • Truck - Medium
  • Truck - Heavy
  • Trailer
  • Bus & Coach
  • Fire & Emergency
  • Construction
  • Military
  • Motor Home

Did You Know?

WABCO is the first to the NA market with OnGuard. 20,000+ systems in the field; 3 billion highway miles.

Intelligent Trailer Interlock

The WABCO Intelligent Trailer Interlock (ITI) system was designed for active braking of a trailer while loading or unloading product.


The Intelligent Trailer Interlock (ITI) system uses wheel speed and switch position to apply the service brakes in order to immobilize a trailer under certain conditions.