JAM, or traffic jam, refers to a situation where vehicles are unable to move or are moving very slowly on a road. This can occur due to various reasons, such as accidents, road construction, or high volumes of vehicles. Traffic jams can lead to increased travel times and frustration for drivers and passengers. During a traffic jam, the flow of vehicles is disrupted, causing congestion. This can also contribute to environmental issues, as idling cars emit more pollutants. Solutions to reduce traffic jams include improving public transportation, implementing carpooling, and enhancing road infrastructure, such as adding traffic signals or overpasses.