The following cards are required to be added to permit the simulation of a 3rd vehicle.
Card 52 - Initial Conditions: Veh
Card 54 - Dimensional and Inertial Properties: Veh3
Card 56 – Tire Properties: Veh3
Card 58 - Braking/Tractive Force Tables: Veh
Card 98 – Collision Model inputs: Veh1 Trailer or Veh3
Card 99 – Trailer Release Option: Veh3