The only single suburban cars with a driving station at both ends were of the sliding door Tait type. These cars were used at Off Peak times as shuttles including Alamein, Williamstown and Altona . The VR Commissioners took several Tait motor cars and modified them by installing a driving station in the other end.
No Harris, Hitachi or Comeng cars were ever modified for such single car EMU operation .
VLP did consider on more than one occasion the operation of fixed car consist H sets with an N class loco on one end and the trailing BTH car being modified as a driving trailer . The project was never proceeded with owing to the cost of modifications including strengthening the car ends where the driving station would be, and also the cost of fitting the consists with heavy through cabling for HEP . Even the Grey Ghost Motor cars were considered by VLp as driving trailers, but the cost/benefit did not stack up so we ended up with 15 H sets with the two small van BCH cars ex Grey Ghost motor cars .
The H cars as originally converted used the former EMU control cable to carry HEP through the train, and 4 H cars was the limit for power transmission with HEP electrical load on diameter of cable . Since then all 55 H cars have progressively been fitted with heavier HEP cabling . These sets are now all formed into 6 car sets hauled as either Push/Pull by 2 x P class, or hauled by a single N class loco, or A Class loco and PH powervan .