E-bike use sparks concerns over safety and congestion at Acadia National Park

Residents say growing numbers of e-bikes are making some carriage roads feel crowded and unsafe.

They worry that fast, quiet bikes can startle horses and make it harder for walkers and traditional cyclists to share the paths.

E-bikes also help older people and visitors with physical limitations travel farther.

Park officials are considering rules for businesses that deliver bikes in the park.