This was sold to me without tracks, but that's OK, we have enough of those. There is no "A3" in this set, so the tracks are nothing special. The bridge is missing, as are two bridge supports. The bridge supports are the normal 33254 Super Supports, those can easily be found. The bridge on the other hand is something else, I don't know if I'll ever find that as a "stand-alone" to complete the set.
This same set is also known under a different product number as 33803 City Rescue Set.