Yes as for example as i've seen before a 15 inbound can be a 15A outbound which in turn will have to be a 15A inbound AX469-483 which unfortunately at the moment aren't for any routes other than the 15s operate all day on the 15s The same for the 77/77A/50/56A THEY CAN SWAP AT Ringsend for example last week RA245 operated an inbound 50 but i saw it heding to tallaght a few mins later as a 77A AV1-14 205-211 and the RAs are the mainstay of these routes daily