Photo by Sawyer D'Argonne / sdargonne@summitdaily.com More than three months after the Summit Stage integrated its first electric buses into its fleet, the organization is optimistic about the future of the program, despite some hiccups along the way. In October, the Summit Stage added three new Proterra electric buses to its fleet, part of an effort to eventually transition to 100% electric vehicles. Summit County Transit Director Chris Lubbers said the buses have largely met expectations, though officials continue to experiment with the buses to determine their full capabilities. “We have found that they do perform well,” Lubbers said. “They’re quiet, and so far, the heating isn’t a problem in the extreme temperatures that we’ve endured recently. … Obviously, the range of electric buses hasn’t matched the range of diesel buses. We knew that going in. … We’re experimenting with that range. We don’t have exact numbers right now, but we have found them to be effective and to work well on multiple routes.”