The cross broder 170 are only the Alexander PS ones, the DM ones
never made it through the border .The DM ones and some Alexander
ones served 170A , whlie the Alexander ones does the whole route
(which there are very few full route 170 buses) and the
shortworking one, Kranji to Larkin (which 170 has most of its buses
doing this, then). (Info by SBS9819Y)