§ 21-604. Turning, slowing, and stopping movements; required signals
(a) Manner of making turn. — A person may not turn a vehicle at an intersection, unless the vehicle is in the position required by § 21-601 of this subtitle.
(b) Entering private roads or driveways. — A person may not turn a vehicle to enter a private road or driveway or otherwise turn a vehicle from a direct course or move it right or left on a roadway or from a shoulder or bikeway onto a roadway, unless the movement can be made with reasonable safety.
(c) Required signals. — A person may not, if any other vehicle might be affected by the movement, turn a vehicle until he gives an appropriate signal in the manner required by this subtitle.
(d) Where signals to be given. — When required, a signal of intention to turn right or left shall be given continuously during at least the last 100 feet traveled by the vehicle before turning; except that a bicyclist may interrupt the turning signal to maintain control of the bicycle.
(e) Stopping or decreasing speed. — If there is an opportunity to signal, a person may not stop or suddenly decrease the speed of a vehicle until he gives an appropriate signal in the manner required by this subtitle to the driver of any other vehicle immediately to the rear.
(f) Use of signal lamps. — The signals provided for in § 21-605 (b) and (c) of this subtitle:
(1) May be used to indicate an intention to turn, change lanes, or start from a stopped, standing, or parked position; and
(2) May not be flashed as a courtesy or “do pass” signal to the driver of any other vehicle approaching from the rear.
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