"The loud trams are not conducive to the visitor experience," Gediman said.
Park officials hope to break ground in June on the 150th anniversary of the date President Abraham Lincoln signed the grant that set aside Yosemite Valley and the Mariposa Grove for preservation, a first for the federal government.
The improvement project would be paid for by the Yosemite Conservancy. The plan is available on the park's website. Comments will be accepted through May 7.