IDOT repurposed an over height detector to use as a counter for trucks.
Illinois DOT (IDOT)
Visual Guide to Illustrate What Is and Is Not a Divisible Freight Load
IDOT has developed a visual guide (Guidelines for Overweight Permit Movements and Divisibility) to help enforcement and truckers understand what is and is not considered a divisible freight load to support consistency in enforcement and to help truckers avoid violations and unnecessary stops.