• Establish a single person in each park who is responsible for protection of the soundscape.
  • Involve concessionaires in noise reduction since they are a vital component of operations in many parks.
  • Establish quiet zones and quiet times to raise awareness of noise issues among park visitors.
  • Inform visitors who enter parks with loud vehicles of the parks’ desire to limit noise.
  • Forge a partnership with the Institute of Noise Control Engineering of the USA (INCE/USA) to bring expertise to bear on noise problems in the parks, perhaps through an INCE/USA technical committee or sessions at INCE’s annual meetings.

Trevino acknowledged that the Park Service needs to lead by example in regulating noise in the parks. Others commended the Park Service for steps it is already taking to reduce noise and its mandate to protect visitors’ enjoyment of the parks. One participant suggested action on noise from snowplows since the noise can be heard from 10 miles away when the machines operate above treeline.

In terms of the feasibility and desirability of a noise restriction on people coming into national parks, participants observed that some groups and individuals may resist—such as motorcycle groups that favor modified (i.e., louder) exhaust systems. But such a restriction would nonetheless significantly reduce noise in the parks. Trevino noted that states have begun to adopt noise restrictions on motorcycles, but she also pointed out that many people urge advocacy in the parks on noise levels ahead of regulation. For instance, sound levels from motorcycles have been recorded and measured to help make motorcycle riders aware of the noise they generate. This approach can be applied to all vehicles, not just motorcycles.

Finally, workshop participants expressed interest in a continuing forum for review of noise issues and policies, to extend the deliberations of the workshop and continue to lay the groundwork for reducing noise in the national parks.

Trevino and Turina expressed their thanks to workshop participants and said they would begin to develop an implementation plan the next day. Showing that the benefits of noise mitigation can extend to actual cost savings for parks and for the Park Service will be critical, they said.

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