I decide where the bsses go depending on how near each location is where the children are; for example i wouldnt send one bus to pick up some children at Worthing then travel all the way to Ipswitch. I would go to Worthing then any nearer destinations such as Brighton or Sothampton. Any bug going to Ipswitch will only go to one other destination other than Ipswitch, for instance Lewisham, Newham, or Brentwood, as they are on the way to Ipswitch and it wouldn't harm to pick the children up so long as there was room in the bus. Then with the time table i set a random trial start time and add five minutes onto each stop time then see how much over or under 12:00 Oclock they arrived at Crawley, then if the bus was early i would add on the exact amount of time they were early, for examply 20 minutes onto the original departure time and add on five minutes each time like normal. If the time was over the requested arrival time i would take away the exact time i was over from the original departure time and add five minutes to each destination as usual, so far i have tried four different senarios and each bus has arrived exactly at 12:00 Oclock, so far it seems to be working, but i dont think my map stategy is going too well i still need to figre that out.