Photos: Electric Bus TourNews | February 7, 2017 Proterra brought one of their Catalyst battery-electric vehicles to Aspen on Tuesday afternoon for a test run where a group, including the Mayor was taken on a short trip up Hunter Creek. The City of Aspen is considering gaining some busses that do not require fossil fuels and have zero-emission. The City of Aspen is looking at working with Proterra on obtaining proper funding through a grant, loan or financing program. Park City, Utah, recently gained some of these busses and Proterra stressed that this is "no longer a new technology," that cities across the country are putting purchase orders in. Proterra has developed a customizable battery system that allows for flexibility in meeting route requirements for various fleet sizes.Anna Stonehouse/The Aspen Times | Start a dialogue, stay on topic and be civil. If you don't follow the rules, your comment may be deleted.