A vehicle comprises a communication interface for enabling information to be communicated to a and from an occupant of the vehicle and a trailer back-up assist system coupled to the communication interface. The trailer back-up assist system is operable for determining a selected width of a lane within which the vehicle and an attached trailer are to be backed from a current position of the vehicle to reach a targeted location for the attached trailer and for outputting to the occupant of the vehicle via the communication interface information characterizing an ability of the vehicle to be backed within the lane from the current position of the vehicle.