If it's a school bus, whenever the lights are flashing.
Vehicle drivers must expect that a bus will stop at a bus stop. If it is unsafe to overtake the stopped bus, then the vehicle driver must wait until the way is safe to overtake the stopped bus. If the way is clear, then the vehicle driver doesn't need to stop behind the stopped bus, but can overtake if it is safe to do so. It is all about common sense!
yes you do
No, stop is not an adjective. Stop can be either a verb or a noun. (stop, stopped, stopped; bus stop) When used with another noun (e.g. stop sign), it is called a noun adjunct (attributive noun).
The school bus is on the opposite side of a roadway that is divided by a physical barrier.
The bus stops flashing its red light and (if applicable) withdraws its stop sign.
STOP!!
You stop and wait until the bus turns off their lights and the bus takes off.
If the highway isn't divided by a physical barrier, you're required to stop, regardless of which lane you're in. As for the stop sign, the bus driver isn't supposed to have that stop sign out until the bus is stopped with red lights flashing, and they have ensured that traffic has stopped. However, their error doesn't negate your requirement to stop.
True
Until the stop sign on the side of the bus is pressed to the bus and the red lights behind it are off and the bus is moving forward again.
Slow down and be prepared to stop if the bus flashers turn to red.
No.Added: The laws regarding stoipped school buses are in effect no matter where the bus is operating. In fact they are pretty much universal throughout the entire US, and you can readily assume that when you see one stopped with lights flashing you must stop, wherever you are.