Not all busses do, you can look at many examples that they don't, but since apparently yours do, I would assume they are meant for visibility reasons, or for identifying a particular route, or bus.
Public buses often have a blue light in the back seat to indicate the presence of a surveillance camera, enhancing passenger safety and deterring anti-social behavior. The blue light serves as a visible reminder to passengers that they are being monitored, which can help reduce criminal activity. Additionally, it can provide reassurance to passengers, knowing that their safety is a priority.
a blue whale is 3 double-decker buses
Yes. Blue lights are only legal for law enforcement personel. In Pensylyania volunteer firemen are allowed to have them. But NOT in West Virginia. Ther are even laws regarding signage and store fronts with blue lights and have to be so many feet back from the road.
Jew Blue Lights
No because due to no seat belts and the fact that it's not an emergency vehicle, they are not allowed to go through red lights. Never try that.
Some of the buses are red, others are blue, red and white and occasionally green.
Yes, such as a Blue Bird Vision, but only some school buses are compatible.
Well,yes,depending if you are in the midlands.
yes because back in the 1980s we had no Flat nose buses
Blue
yes as long as they are not on the dash or con the back ledge
At 882 ft 6 in (269 meters), four buses back-to-back are still not as long as the Titanic.