gridlock

gridlock：大混雑、身動きのできない状態
As someone who caught in that gridlock early this morning,I can tell you the people were nontheless exuding joy.(by CBS Nwes)

Gridlock on a network of two-way streets. The red cars are those causing the gridlock by stopping in the middle of the intersection.
Gridlock is a type of traffic jam where "continuous queues of vehicles block an entire network of intersecting streets, bringing traffic in all directions to a complete standstill".[1] The term originates from a situation possible in a grid plan where intersections are blocked, preventing vehicles from either moving forwards through the intersection or backing up to an upstream intersection.

The term gridlock is also incorrectly used to describe high traffic congestion with minimal flow (which is simply a traffic jam), where a blocked grid system is not involved. By extension, the term has been applied to situations in other fields whereflow is stalled by excess demand, or in which competing interests prevent progress. (From Wikipedia, the free encyclopedia)