Itinerary details should indicate if the user should change vehicles or stay in the same vehicle when a transfer happens on a stop. An example where a user could stay in the same vehicle that changes it's route number can be seen here:
It should be decided how this information is reported to the user.
A field called 'interlineWithPreviousLeg' will be added to the API. This tells whether the leg continues in the same vehicle as the previous leg.