You come to an intersection that is blocked by other traffic. You should:
Go slowly until the traffic ahead moves.
Get as close as possible to the car in front of you.
Stay out of the intersection until you can pass through.
Sound your horn to make the cars move up.
You cannot enter an intersection if traffic is backed up on the other side and you cannot get completely through the intersection. Wait until traffic ahead clears so you do not block the intersection.