Why this matters

• Excessive vehicle noise affects neighborhoods well beyond major corridors

• Residents report repeated daily disturbances from modified exhausts and racing activity

• Loud vehicle activity is often associated with speeding and reckless driving behavior

• Chronic exposure to elevated noise can negatively affect sleep, stress levels, and overall health
   

What residents reported
Initial responses collected from residents near the Broadway corridor

• 68% of residents are disturbed multiple times per day

• 85% support stronger enforcement of vehicle noise laws

• ~75% support automated enforcement tools like sound cameras
  
   

What the law says

• Colorado law prohibits modifying a vehicle to be louder than its original factory muffler

• Denver also prohibits excessive or unreasonable vehicle noise

In practice:

• The “no louder than stock” standard cannot be measured in real-world conditions

• Enforcement depends on impractical testing methods or subjective judgment
  
   

The problem

Denver has laws against excessive vehicle noise—but they are difficult to enforce in real-world conditions.

• Standards rely on outdated and impractical testing methods

• Enforcement is effectively absent in day-to-day conditions

• Agencies lack practical tools to apply the law on the street
   

 Result:
A small number of vehicles operate with little accountability

 

What we’re trying to do

• Document where and how often this is happening

• Show the scale of the problem across neighborhoods

• Support practical, enforceable solutions