Dear drivers,

To keep , please follow the rules.

* You may go on if the light is green. When there is a red light, you must .

* Wait the light changes to green if you want to turn left.

* Whether the light is green or red, you can turn right if there are no cars in of you.

* Color-blind people cannot see the difference red and green, so please don'tdrive.

* Please remember not to drive fast around a school.