Iowa Code » Chapter 321 — MOTOR VEHICLES AND LAW OF THE ROAD
Iowa Code

Iowa Code § 321.318 (2026)

Method of giving hand and arm signals

✓ current as of July 2026
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All signals required under this chapter which may be given by hand and arm shall when so given be given from the left side of the vehicle and the following manner and interpretation thereof is suggested:

1. Left turn — Hand and arm extended horizontally.

2. Right turn — Hand and arm extended upward.\n\nTue Dec 09 22:17:00 2025 Iowa Code 2026, Chapter 321 (137, 2) 201 MOTOR VEHICLES AND LAW OF THE ROAD, §321.322\n\n 3. Stop or decrease of speed — Hand and arm extended downward. [C39, §5025.08; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §321.318] 2021 Acts, ch 80, §173 Referred to in §321.314, 321.316, 321.317, 805.8A(6)(q) For applicable scheduled fine, see §805.8A, subsection 6\n\n RIGHT-OF-WAY \n

Notes of Decisions
Cited in 7 cases, 1948–1971 · leading case: Mathews v. Beyer, 116 N.W.2d 477 (Iowa 1962).
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Mathews v. Beyer, 116 N.W.2d 477 (Iowa 1962). · cites it 4× “Such signal might be *481 given by hand and arm in the manner provided by section 321.318 or by directional signal device or light of a type approved by the department of public safety (section 321.”
Jesse v. Wemer & Wemer Co., 82 N.W.2d 82 (Iowa 1957). · cites it 4× “" Section 321.318 designates the meaning of each arm signal required, when that method is used.”
Baker v. Wolfe, 164 N.W.2d 835 (Iowa 1969). · cites it 4× “(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 of a type approved by the department and conforming to the…”
Mongar Ex Rel. Mongar v. Barnard, 82 N.W.2d 765 (Iowa 1957). · cites it 2× “Section 321.318 suggests the same hand-and-arm signal be given for both purposes.”
Young v. Blue Line Storage Co., 44 N.W.2d 391 (Iowa 1950). · cites it 2× “” *131 Section 321.318, Codes 1946 and 1950, provides that the signal for a left turn is by “hand and arm extended horizontally.”
Janvrin v. Broe, 33 N.W.2d 427 (Iowa 1948). · cites it 2× “” In Instruction V the court gave the pertinent substance of said section, and of section 321.318, Code, 1946, designating the method' of giving hand and arm signals.”
Lovely v. Ewing, 183 N.W.2d 682 (Iowa 1971). · cites it 2× “The instruction as given referred to a hand and arm signal but did not include the statutory requirements of such a signal under section 321.318. It also told the jury the signal could be given by electrical signal device.”
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