The promise of frequent fast buses on a friendlier Colorado Boulevard drew 140 residents out of rush hour jams along this often-overloaded state highway and into a Colorado Department of Transportation forum recently to examine plans for an overhaul. They hovered over a tabletop map of the route for CDOT’s proposed “bus rapid transit” (BRT) — high-capacity buses that zip to sleek stations along what typically are dedicated lanes — scrawling suggestions on bright-colored sticky notes: “Free rides for the older population.” “Bus service should be easy to use.” “Please keep three through lanes.” “Lower prices.” They surrounded CDOT’s project designers weighing pros and cons of converting car lanes for buses and whether the BRT should run down the center or a side.