Which Vehicle Should Go First

[Maximus]

u mean VIP shud becum VP at end ?

man you are also a VIP..

[ravula]

1) Is Ambulance's siren on?
yes - ambulance first
no - step 2
2) Is Police's siren on?
yes - step 1 otherwise Ambulance
no - step 3
3) VIP
yes - step 1 otherwise VIP
no - step 4
4) School Bus
yes - step 1 otherwise Schoolbus

feel free to correct me...

You are great man