It may be good, but who is making the checks that passenger put
on their seatbelts?
Like those seatbelts in the back seats of cars, if there is no law
enforcement, do you think passengers will still put on those seat
belts even if seat belts provided?
I can't imagine having the traffic police making their checks in a
double decker bus. 
Having seat belts would definitely just increase the operational
costs of bus companies.
Heard what TIBS said about the EURO4 standard, it could increase
their operational cost by 30%! And they are required to implement
them by 2006.
Will TIBS raise bus fare this year in anticipation of EURO4 in
2006?