A self-service terminal (SST) (10) for interaction with vehicle-based users includes a projection unit 36 which projects an image onto a vehicle windscreen. The image may include instructions or options for the user, or other information. In one embodiment, the SST also includes a sensor unit (38) which detects an action performed by the user on an area of the projected image. The actions are interpreted into instructions for a processor (34), which may then instruct the SST (10) to perform the appropriate action. The SST may also include a non-contact user identification means.