The DMUs, which can be configured in trainsets of two or three vehicles accommodating 120 or 180 seated passengers, are EPA Tier 4 compliant
and can be converted to electric operation with catenary. They will operate on 15-minute headways, with a 25-minute trip time between Union Station and Toronto Pearson Terminal 1 (directly adjacent to the Automated People Mover (APM) station), over the existing and upgraded GO Transit Kitchener Line, with a new spur into the airport. Trip distance is 23.5 km (14.5 miles). There are two intermediate stops, at the Bloor-Dundas and Weston GO Transit regional/commuter rail stations.
The new spur into the airport is currently under construction by AirLINX Transit Partners Inc. (a consortium of Aecon Construction and Materials Limited and Dufferin Construction Company, overseen by Metrolinx and Infrastructure Ontario), and is close to completion. Service is slated to begin in 2015, in time for the 2015 Pan Am and Parapan Am Games in Toronto.