Answer:
When this is found in a road you are forced to make a decision.
If you drive on this, pedestrians and the police will be pretty upset with you.
I have one eye, See near and far, I hold the moments you treasure, And the things that make you weep.
Every country has one, though we are not the same. Waving to our citizens, throughout the wind and rain. What is it?
What occurs four times in every week, twice in every month, only once in a year but never in a day?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.