Trams of Australia
This tram appears to have been developed as a prototype driver-only tram, although it was probably not operated that way. It is of "Peter Witt" design.
The Y1 was fitted with a sloping windscreen to avoid the reflections of internal lighting getting in the driver's eyes. Larger wheels were introduced to improve the ride, and reduce noise. It is possible that this tram was intended to be the new standard design for Melbourne, but its potential for driver-only operation meant that union opposition was certain, so development of the W-series (with the W3) was continued instead.
Numbers 614 - 623 were reserved for 10 more of these trams, but they were never built.