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Longmont, CO Mobility & Curb Rules: Red-Light Cameras (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

Key Facts

Signal violation penalty
Up to $75
Speeding penalty
$40, or $80 in school zone
Adopted
Ord. O-2024-77, Nov. 2024
Corridors
13 named streets, per § 11.05.050

Summary

Longmont runs an automated vehicle identification system that photo-cites red-light-signal violations and speeding in school zones, residential streets, and 13 named corridors.

(a)If the city detects a violation of Model Traffic Code section 604(C)(1), as amended by the City of Longmont, for disobedience to a traffic control signal through the use of an automated vehicle identification system, the maximum penalty, including any surcharge, is $75.00.(b)The city shall not use an automated vehicle identification system designed to detect disobedience to a traffic control signal or other violation of a local traffic ordinance unless the city posts a sign notifying the public that an automated vehicle identification system is in use immediately ahead. Such sign shall:(1)Be placed in a conspicuous location not less than 200 feet and not more than 500 feet before the automated vehicle identification system; and(2)Use lettering that is at least four inches high for upper case letters and 2 9/10 inches high for lower case letters. (Ord. No. O-2024-77, § 1, 11-19-2024)

Full Breakdown

Chapter 11.05 of the Longmont Municipal Code, adopted in 2024, authorizes camera enforcement of both signal violations and speeding. Under § 11.05.040, a disobeyed traffic control signal caught by camera draws up to a $75 civil penalty, and the city must post warning signage 200 to 500 feet ahead. Under § 11.05.030, camera-detected speeding is capped at $40 (or $80 in a school or work zone), and first-offense low-level speeders get a warning before any fine. Cameras are limited to school zones, residential streets, park-adjacent streets, and 13 council-designated corridors listed in § 11.05.050, and may not be used on interstate highways.

Violations & Fines

A camera-detected signal violation carries up to a $75 civil penalty under § 11.05.040; camera-detected speeding carries up to $40 ($80 in school or work zones) under § 11.05.030: both are civil, not criminal, and owners may contest by written hearing request within 46 days.

Frequently Asked Questions

Does Longmont use red-light cameras?
Yes. LMC § 11.05.040 lets the city cite signal violations caught by an automated vehicle identification system, capped at $75 including surcharges, with advance warning signage required.
Are school-zone speed cameras separate from red-light cameras?
They run under the same Chapter 11.05 program; speeding is addressed in § 11.05.030 with its own $40/$80 penalty schedule and a warning-first policy for first-time low-level offenders.

Sources & Official References

Other rules in Longmont

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