One must make a loud noise before passing a car on the left.
Background information (if available):
31-15-4 Overtaking on left.
The following rules shall govern the overtaking and passing of vehicles proceeding in the same direction, subject to those limitations, exceptions, and special rules stated in this section:
(1) The driver of a vehicle overtaking another vehicle proceeding in the same direction shall give a timely, audible signal and shall pass to the left at a safe distance and shall not again drive to the right side of the roadway until safely clear of the overtaken vehicle.
(2) Except when overtaking and passing on the right is permitted, the driver of the front vehicle on the audible signal of the overtaking vehicle shall give way to the right, and shall not increase speed until completely passed by the overtaking vehicle.