WEST GLACIER, Mont. (AP) — Supporters of Glacier National Park and fans of its iconic red tour buses are upset that the park’s new concessions contract calls for replacing half of the buses with alternative fuel vehicles by 2029.

“I believe it would be an absolute tragedy to eliminate any of the red buses from the fleet,” said Bruce Austin, who served on the Red Bus Team that worked to refurbish the fleet from 1999 to 2002. “They should all be kept and refurbished. The public’s interest in these vehicles is huge.”