The traffic jam is because the capacity of the road cannot meet the traffic flow of vehicles, which leads to vehicles queuing up to pass the bottleneck area. The following are the main reasons for traffic jams:
1. Insufficient road capacity: the width of the road and the number of lanes limit the flow of vehicles. When the number of vehicles exceeds the road capacity, congestion will occur.
2. Traffic accidents: traffic accidents will lead to road closure or restriction of traffic, which will lead to vehicle congestion.
3. Road construction: road construction will lead to road closure or restriction of traffic, resulting in vehicle congestion.
4. Unreasonable traffic planning: Unreasonable traffic planning will lead to road congestion. For example, lack of reasonable entrances and exits, insufficient number of lanes, and unreasonable traffic lights.
5. Too many vehicles: urbanization and the increase of car penetration rate have led to a rapid increase in the number of vehicles, which exceeds the road capacity.
6. uncivilized driving behavior: uncivilized driving behavior such as not abiding by traffic rules, speeding, occupying emergency lane, etc. will lead to traffic accidents and road congestion.
In a word, the causes of traffic jams are various and need to be comprehensively analyzed and solved from the road, vehicles, traffic planning, driving behavior and other aspects.
