Aurora, CO Noise from Specific Sources: Delivery Truck Noise (2026)
Key Facts
- Idling limit
- 15 min per hour, citywide
- Residential noise cap
- 55 dBA day / 45 dBA night
- Commercial noise cap
- 60 dBA day / 55 dBA night
- Sleeper-cab exemption
- 1/4 mile from residential
- Governs
- Aurora, Colorado only
Summary
Aurora caps diesel truck idling at 15 minutes per hour citywide and sets decibel limits by adjacent zone, covering delivery truck noise at loading docks.
Idling or permitting the idling of a motor or any stationary diesel fuel burning vehicle or motor vehicle of any kind for a period in excess of 15 minutes in any hour, within the City limits at any time is prohibited. This Section shall not apply to: i. Engines that must be operated in the idle mode for safety reasons... and ii. Uses where freight drivers sleep in their cabs; provided, that the location of the idling is at least one-quarter mile from residential dwellings and from Residential zone district boundaries.
Official source re-checked September 8, 2026: no newer edition of the code had been published (publisher’s edition: current through Ordinance 2026-30, passed June 22, 2026).
Full Breakdown
Under the Aurora Unified Development Ordinance's citywide operating standards, idling a stationary diesel-fueled or other motor vehicle for more than 15 minutes in any hour is prohibited anywhere in the city, which directly limits delivery trucks left running at curbs or loading docks. ) next to residential land, versus 60/55 dBA for commercial and 70/65 or 80/75 dBA in the I-1 and I-2 industrial districts, so a delivery truck's engine or backup-alarm noise is judged against the zone it borders. A narrow carve-out lets freight drivers idle while sleeping in their cabs if they stay at least a quarter mile from residential dwellings or Residential zone boundaries; construction-safety idling (cranes, forklifts) is also exempted.
Loading doors themselves must sit inside the site, out of view of the public right-of-way, partly to curb noise reaching abutting streets and residences. Colorado's home-rule authority under Aurora's Charter supports this local standard; it does not displace any separate state vehicle-idling or emissions rule.
Violations & Fines
City enforcement (Neighborhood Services/code enforcement) can cite excess idling or a sound-level exceedance as a municipal violation under UDO § 146-4.11.2.E; fines follow the general UDO enforcement and penalty provisions.
Frequently Asked Questions
Can a delivery truck idle in front of my Aurora home?
What noise level applies to a loading dock next to houses?
Does this apply outside Aurora city limits?
Sources & Official References
Other rules in Aurora
Compare Aurora to another location·View the Colorado noise from specific sources overview
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