Traffic Signs

What is the meaning of the sign?

Portable flashing board: warning and direction signal at its placement site at a road works area.· Correct answer
Portable flashing sign upon leaving an inter-urban road to enter a motorway (freeway).
Portable flashing sign for advertising to drivers.
Portable flashing sign before entering an airport.

Explanation

Sign 933 is a portable flashing board used to give a warning and direction signal at the place where it is set up at a roadworks site. The board has flashing arrows that direct drivers toward the correct direction of travel through the work zone.