It is never legal to go above the posted limit. Even when passing a vehicle. That's called an absolute speed law. Only emergency vehicles responding to an emergency may exceed the limit and then only when "reasonable".
The speed limit is the top speed that is legally allowed. If it is exceeded, you are breaking the law.
The posted speed limit is the max speed.
the posted speed limit
826 limit
You can be ticketed for traveling at an unsafe speed regardless of the speed limit.
Whatever the posted speed limit is.
Yes it is acceptable to momentarily accelerate over the speed limit tp get around a vehicle moving slower than the posted speed limit but you must return to the speed limit after passing.
When it is flashing the speed posted is the limit
The maximum speed limit.
In most states, the speed limit in a school zone when not posted is typically 20 mph.
If the posted speed is not safe at that time
In many locations that is the statutory speed. HOWEVER - the legal speed limit at that time and place is WHATEVER IS POSTED. Many school locations are posted with speed limits that are different from the 'usual' prevailing speed on that roadway.