Montana Title 61. Motor Vehicles § 61-8-336. Turning movements and required signals

(1) A person may not turn a vehicle at an intersection unless the vehicle is in proper position upon the roadway as required by 61-8-333 or turn a vehicle to enter a private road or driveway or otherwise turn a vehicle from a direct course or move right or left upon a roadway unless the movement can be made with reasonable safety and until an appropriate signal has been given. A person may not turn a vehicle without giving an appropriate signal in the manner provided in this section.

(2) A signal of intention to turn right or left, other than when passing, must be given continuously during not less than the last 100 feet traveled by the vehicle before turning in any business district, residence district, or urban district.

(3) A signal of intention to turn right or left, other than when passing, must be given continuously during not less than the last 300 feet traveled by the vehicle before turning in areas other than those set forth in subsection (2).

(4) A person may not stop or suddenly decrease the speed of a vehicle without first giving an appropriate signal to the operator of a vehicle immediately to the rear when there is opportunity to give the signal.