Why Does Traffic Jam Happen on Rainy Days?

[JulietFitz]

The reasons for traffic jams on rainy days are as follows: 1. Drivers become more cautious: People tend to drive more cautiously in rainy weather, often slowing down, which extends travel time and increases the load on the traffic system, leading to congestion. 2. Slippery road surfaces: After rain, road surfaces become slippery, reducing the friction coefficient. Combined with increased friction, inexperienced drivers are more likely to be involved in accidents, and traffic violations also rise, naturally decreasing traffic efficiency. The incidence of traffic accidents on rainy days is more than five times higher than usual. 3. Increased traffic volume: On rainy days, people are more likely to use private cars or taxis for travel. In contrast, on sunny days, they might opt for non-motorized vehicles or walking. The increased number of cars and buses on rainy days contributes to higher traffic volume.