If Parsons can construct the additional lanes with minimal governmental subsidy, it would be fully worth it.
Additionally, a coach transit solution should be evaluated. Right now, many RTD intercity coaches are used during the weekday peak, but otherwise idle. Perhaps after the Friday evening rush, RTD coaches could depart the various metro-area park-n-rides to the mountains, and return on Sunday, in time for the Monday morning rush. RTD already has experience with a similar service to the airport, SkyRide, and should be able to use their knowledge to operate a service to the mountains.