fuel in 2002. these bus upgrades can retrofitting the fleet with green diesel technology, so the county can go environmentally friendly. more bus stations continues to increase, with the opening of the lorton park-and-ride in 2003, and the gambrill road park-and-ride in 2005. the connector began installing the smartrip fare card technology, so that passengers can pay their fare using wmata's smartrip. in june 2009, service was transitioned from the metrobus 2w, 12-, and 20-series routes to the connector in the centreville, chantilly, and oakton areas along i-66 and near vienna/fairfax-gmu station.