Mizter T wrote:

The NLL/WLL were never converted for DOO, but the DC Line was. For
whatever reason there's some issue with the 378s running on DOO mode,
so they haven't appeared in service on the DC Line.

Given the route is already DOO, the basic class of train is already in
widespread use in DOO areas, and Bombardier are unlikely to have 'reinvented
the wheel' equipment wise, you would hope it's a minor issue.

Maybe the drivers want extra cash for looking at internal monitors rather
than external mirrors or something...

Paul S