• Turning off idling vehicles, using auxiliary power units, or moving vehicles to sheltered locations can reduce noise in parks, particularly at the most visited locations, such as overlooks.
  • Technological options such as quiet pavements, new kinds of backup alarms, quieter engines and tires, and short berms along-side roads offer potential ways to reduce noise.
  • Quiet zones, quiet times, reduced speeds, and scheduling of transit can limit noise at sensitive times, such as dusk and dawn when wildlife activity tends to be more prevalent.
  • Communication through the latest technologies, such as Twitter, Facebook, and texting, should be considered.

Themes from the Breakout Group on Facilities and Maintenance

  • A construction guide for park employees could help them prepare for construction projects by, for example, establishing noise metrics and noise limits for the project.
  • Noisy operations can be limited or reduced through scheduling, relocation of noisy work elsewhere, or use of different equipment.
  • A database of existing equipment and of noise-producing operations could inform park operations and maintenance of the best procedures for reducing noise.
  • Involving concessionaires and other stakeholders in discussions and decisions can build understanding and support for low-noise policies.
  • Guidelines for buying quieter products and mitigation strategies for existing equipment can be included in planning and contracts.

Themes from the Breakout Group on Construction

  • Flexibility and good practice are both necessary to make effective tradeoffs among the duration, noise levels, and cost of construction projects.
  • Noise can be limited at its source through measures such as scheduling, equipment restrictions, better maintenance, reduced power operations, quieter backup alarms, and noise compliance monitoring.

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