What are the laws on Day and night speed limits and some say Truck speed limit does that apply for me?

Question

What are the laws on Day and night speed limits and some say Truck speed limit does that apply for me?

Answer 1

if your driving an 18 wheeler, it does.

Answer 2

the night speed limit is usually 5 mph below what the speed limit sign says

and unless you are a trucker or you would be driving a fleet size truck then no they don't.

Answer 3

They only apply to large truck driver that are over the 26,000 pound limit..............