Service 58 is both controlled by AMDEP and BNDEP. Striders on 58
are also common, with SBS 1917A as perm.
It's confirmed that the Strider on 58 is SBS 2624M by photo
analysis.
For the Service 56 bus, I believe that it was not a CAC. Merc DM
CAC buses are given four digit regos; Merc DM OAC are given three
instead. So the Service 56 bus that must have been involved in this
accident would be either SBS 0431R, SBS 0516E or SBS 0570Y. It
cannot be SBS 0571U since it had received a new ad.
So, what's your guess? 
ADD: Notice that the Service 56 Merc can also be a cameo.
