From Amtrak:

In the next step toward a nationwide eTicketing system, conductors on the Downeaster this month began scanning “print anywhere” eTickets using handheld mobile device.

eTicketing provides significant benefits over traditional paper tickets. Passengers no longer have to pick up their tickets at a station, and they do not have to worry about keeping up with paper tickets that would have to be repurchased if lost. They also can more easily make changes to their trip itineraries while on the go.

For the company and crews, the shift to eTicketing means a reduction in paper usage and access to real-time passenger manifests, which will help the company better manage capacity and revenue.

This pilot project on the Downeaster is being conducted in partnership with the Northern New England Passenger Rail Authority (NNEPRA).

The rollout of eTicketing will continue on the Capitol Corridor, San Joaquin and City of New Orleans routes in early 2012, and is slated to be adopted nationwide by next summer.