1. The signals required under the provisions of this chapter may be given either by means of the hand and arm as provided in section 321.318, or by a mechanical or electrical directional signal device or light conforming to the provisions of this chapter.
2. Directional signal devices shall be designed with a white, yellow or amber lamp or lamps to be displayed on the front of vehicles and with a lamp or lamps of red, yellow or amber to be displayed on the rear of vehicles. Such devices shall be capable of clearly indicating any intention to turn either to the right or to the left and shall be visible and understandable during both daylight and darkness from a distance of at least one hundred feet from the front and rear of a vehicle equipped therewith.
3. It is unlawful for any person to sell or offer for sale or operate on the highways of the state any vehicle subject to registration under the provisions of this chapter which has never been registered in this or any other state prior to January 1, 1954, unless the vehicle is equipped with a directional signal device of a type in compliance with the provisions of subsection 2. Motorcycles, motorized bicycles, and semitrailers and trailers less than forty inches in width are exempt from the provisions of this section.
4. When a vehicle is equipped with a directional signal device, such device shall at all times be maintained in good working condition. No directional signal device shall project a glaring or dazzling light. All directional signal devices shall be self-illuminated when in use while other lamps on the vehicle are lighted.
5. Whenever any vehicle or combination of vehicles is disabled or for other reason may present a vehicular traffic hazard requiring unusual care in approaching, overtaking or passing, the operator then may display on the vehicle or combination of vehicles four directional signals of a type complying with the provisions of this section relating to directional signal devices in simultaneous operation. [S13, §1571-m18; C24, 27, 31, 35, §5032; C39, §5025.07; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §321.317] 87 Acts, ch 170, §8; 97 Acts, ch 108, §17, 18 Referred to in §321.314, 321.316, 321.404A, 805.8A(3)(c) For applicable scheduled fines, see §805.8A, subsection 3 \n
Notes of Decisions
Jesse v. Wemer & Wemer Co., 82 N.W.2d 82 (Iowa 1957).
· cites it 15× “Defendants contend that the court's instructions as to the legal requirement to give a timely and adequate signal of his intention to stop were erroneous, and that plaintiff failed to prove he had given the signal required by Code, § 321.317, I.C.A. The trial court told the…”
Mongar Ex Rel. Mongar v. Barnard, 82 N.W.2d 765 (Iowa 1957).
· cites it 6× “Code (1950) section 321.317 provides the signals of intention to turn and stop or suddenly decrease speed “may be given either by means of the hand and arm or other proper signal or signal device of a type approved by the department * * As *910 stated, it is conceded defendant…”
Mathews v. Beyer, 116 N.W.2d 477 (Iowa 1962).
· cites it 4× “318 or by directional signal device or light of a type approved by the department of public safety (section 321.317). Defendant does not claim he gave such a signal.”
Duffy v. Harden, 179 N.W.2d 496 (Iowa 1970).
· cites it 6× “ns were guilty of contributory negligence (1) in moving the disabled vehicle onto the traveled portion of the highway in front of another stopped vehicle in such a manner as to present a vehicular traffic hazard requiring unusual care during hours of darkness, without giving any…”
Lovely v. Ewing, 183 N.W.2d 682 (Iowa 1971).
· cites it 3× “Sections 321.317 and 321.318 set out the method in which such signal must be given.”
State of Iowa v. Ahmet Mahalbasic (Iowa Ct. App. 2015).
· cites it 2× “Mahalbasic also focuses on his act of turning on his hazard signals, citing Iowa Code section 321.317(5), claiming it showed “he cared” and did not disregard the safety of the other motorists.”
— Iowa Code § 321.317(2) — 1 case
Lovely v. Ewing, 183 N.W.2d 682 (Iowa 1971).
“Sections 321.317 and 321.318 set out the method in which such signal must be given.”
— Iowa Code § 321.317(5) — 2 cases
Duffy v. Harden, 179 N.W.2d 496 (Iowa 1970).
“ns were guilty of contributory negligence (1) in moving the disabled vehicle onto the traveled portion of the highway in front of another stopped vehicle in such a manner as to present a vehicular traffic hazard requiring unusual care during hours of darkness, without giving any…”
State of Iowa v. Ahmet Mahalbasic (Iowa Ct. App. 2015).
“Mahalbasic also focuses on his act of turning on his hazard signals, citing Iowa Code section 321.317(5), claiming it showed “he cared” and did not disregard the safety of the other motorists.”
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