One of the main reasons for traffic is the unnecessary usage of personal cars. We can decrease the traffic by using public transportation and bikes.

Car crashes have a lot of reasons such as distraction or speed, even though congestion of traffic is not a main reason; we can't say that it has nothing to do with it. Being stuck in the traffic makes drivers more stressful and less careful, causing them to have an accident.

 Population movement is closely related to traffic congestion. As more people move to the cities, the number of cars on the road increases.

Traffic does have a negative effect on your health if exposed to daily. People who drive to work every day have a higher chance of having higher blood pressure, a higher chance of being obese, and it also increases anxiety and depression rates.

A lot of European cities started to implement what was called a "Shared space". These shared spaces get rid of all road signs and sidewalks and let everyone move freely, It might seem like a bad idea but British, Dutch, and Belgian city planners say that both car crashes and pedestrian injuries have fallen down drastically if applied correctly.