The light is green, let"s go.
Do not run in the street.
Look carefully when you cross the street.
You should cross the road in crosswalk.
That car is running the red light.
Do not run the red light.
Always be careful of cars when you cross road.
Look the both side when you cross road.
There are no lights here, look carefully when you crossing.
Look both sides and walk when the green light is on.