If this checkbox is selected, the vehicle will travel along a straight line only.
For a forward arc path section, if the Turn Wheels From Stop checkbox is selected, the straight line can be generated in any direction that the steering wheels can turn.
For a reverse arc path section, the Force Straight Line checkbox is only available if the current vehicle is a single part vehicle, and the section will be in line with the vehicle.
Note: When the Force Straight Line checkbox is selected, the maneuver type will change to Forward Line Path (or Reverse Line Path) and the Radius Type list and the Radius information will be unavailable.