If You are in middle of an intersection and blocking traffic and meanwhile the green light turns red then it is a gridlock. If the traffic is blocked then it disrupts traffic in one direction at least. and blocking traffic is violation of law in some states. If you are in California and caught by police then you can be fined for this as per the <em>Anti-Gridlock Act of 1987</em>. This act forbids the divers from entering an intersection.
