A sign with arrows on the road indicates the direction that vehicles should follow.
A yellow sign with two arrows pointing in opposite directions means there is a divided highway ahead.
An exit sign with no arrows is immediately next to or above the actual exit or exit door. An exit sign with an arrow can be away from the exit and points in the direction of the exit.
dont throw trash on the road.
Its a Stop sign
In america, the double R road sign means RAILROAD.
A sign, arrows or gestures on the road and the way cars are going or parked.
that your driving into a box
It is a worded warning sign
The straight road you are on ends at a "T" intersection (road that goes right and left).
No passing zone!
That would usually refer to the additive inverse - meaning you change the sign of the number.