call, you have to look for a sign like...... Other signs often found on roads indicate the traffic situation like .... that warns the road surface is loose. So you should drive more carefully when you see signs otherwise you might harm someone or damage you car. Some traffic signs order you not to do something like..... that mean you are not allowed to below the horn,........Means bicycles are prohibited on this motor way.
in addition, signs are widely used in work places or in factories as safety rules or working regulations. The signs like......