Which department determines the noise emission standards for the motorcycle exhaust in Oregon?

• A. Department of Transportation
• B. Environmental Protection Agency
• C. Department of Environmental Quality
• D. Oregon Department of Motor Vehicles

Answer: (C)

Noise from motorcycle exhaust is treated as an environmental emissions issue, so the state agency that sets and enforces those standards is the Department of Environmental Quality. DEQ handles rules related to air quality and pollution, including environmental noise limits, and it adopts state regulations to implement or exceed any federal baseline. The Department of Transportation focuses on roads and traffic infrastructure, while the DMV deals with licensing and vehicle registration. The EPA provides federal standards, but Oregon-specific rules are implemented by DEQ.