Are Train Horns Legal in Arkansas? (2026 Guide)

Disclaimer. This page summarizes publicly available Arkansas statutes as of April 2026 and is published for general informational purposes only. It is not legal advice, and nothing on this page creates an attorney–client relationship. Statutes change, enforcement varies by jurisdiction, and individual circumstances matter — always verify the current text and consult a licensed Arkansas attorney before making installation or use decisions that may carry legal consequences.

Short answer

Installing a train horn on a private vehicle in Arkansas is not prohibited. Ark. Code §27-37-202 requires every motor vehicle on a highway to have a horn audible at 200 feet, and bars any horn from emitting “an unreasonably loud or harsh sound or a whistle.” Use is limited to cases “reasonably necessary” to ensure safe operation.

In practice: a train horn can be installed and wired; sustained novelty use on a public road can lead to a traffic citation under the loudness clause.

What the statute actually says

Operative rules from that text:

• Every motor vehicle on a highway must carry a horn audible at 200 feet.
• No horn may emit “an unreasonably loud or harsh sound or a whistle” — both loudness and tone are constrained.
• Horn use is limited to cases “reasonably necessary to ensure safe operation.”
• Sirens, whistles, and bells are prohibited on non-emergency vehicles (tied to broader emergency-vehicle provisions in the same subchapter).

No specific decibel cap — loudness is officer-judged against the “unreasonably loud or harsh” standard.

Does the original factory horn need to stay operational?

Yes. The 200-foot audibility requirement is an equipment rule that applies to the vehicle, not to any one horn. Disconnecting the factory unit to rely on a train horn only leaves the vehicle out of compliance with §27-37-202, regardless of how loud the aftermarket horn is.

Run both systems in parallel: factory horn on the OEM button, train horn on a dedicated switch.

Is a train horn a “whistle” under §27-37-202?

Arkansas explicitly bans horns that emit “a whistle.” The statutory term is borrowed from the Uniform Vehicle Code and historically addresses single-tone pressure devices, not multi-trumpet chords.

In practice, an officer may cite under the “unreasonably loud or harsh” standard even if the device is technically not a whistle.

Portable / battery-powered train horns

§27-37-202 regulates “a horn or other warning device” without distinguishing power source. Portable train horns built on the Milwaukee M18, DeWalt 20V, Ryobi ONE+ and Makita LXT platforms are treated identically to air-tank kits:

• Not prohibited to install.
• Subject to the “unreasonably loud or harsh” test if used on a public highway.
• Cannot replace the factory horn for 200-ft audibility compliance.

Little Rock, Fayetteville, and other municipalities sometimes layer their own noise ordinances on top of the state rule — worth checking locally before sustained residential use.

Enforcement in practice

Arkansas is broadly permissive. Urban centers (Little Rock, Fayetteville, Fort Smith) may act on complaints; rural counties rarely issue citations for horn equipment alone. Common enforcement patterns:

• Horn used in a residential area at night
• Complaint from a neighbor or pedestrian
• Horn paired with other equipment violations (exhaust, lights)
• Use perceived as harassment rather than warning

Install alone, without observed misuse, typically doesn’t trigger a stop.

Practical compliance

Our decibel distance calculator shows how loud your horn will actually be at the distance of a bystander — the inverse-square law drops 6 dB per doubling of distance.

How to verify this page

Statute text can change. Before acting on anything here, verify the current version of §27-37-202 on the Arkansas General Assembly’s official Arkansas Code portal and consult a licensed Arkansas attorney for your specific situation. If you notice this page is out of date, please send a correction — we update within 48 hours when a cited source is provided.