A traffic jam is a situation where vehicles are unable to move freely on the road, leading to slow or halted traffic. This can occur due to various reasons, such as accidents, road construction, or a high volume of vehicles. When too many cars are on the road, they can block each other, causing delays for everyone. Traffic jams can happen in urban areas, especially during peak hours when many people are commuting to work or school. They can lead to frustration for drivers and increased travel times. Solutions to reduce traffic jams include improving public transportation and implementing better traffic management systems.