Traffic snarl is a term used to describe a situation in which traffic is congested or blocked due to an accident, construction, or other event. It can be described using three words: JAM, TIEUP, and GRIDLOCK. A JAM is a situation in which traffic is congested and moving slowly. A TIEUP is a situation in which traffic is completely stopped. GRIDLOCK is a situation in which traffic is completely blocked due to a large number of vehicles in a small area.