These issues may make those who have been in a crash afraid to drive again. In some cases, psychological trauma may affect individuals lives, causing difficulty going to work, attending school, or performing family responsibilities. Causes
Road incidents are caused by a large number of human factors such as failing to act according to weather conditions, road design, signage, speed limits, lighting conditions, pavement markings, and roadway obstacles. A 1985 study by K. Rumar, using British and American crash reports as data, suggested 57% of crashes were due solely to driver factors, 27% to combined roadway and driver factors, 6% to combined vehicle and driver factors, 3% solely to roadway factors, 3% to combined roadway, driver, and vehicle factors, 2% solely to vehicle factors, and 1% to combined roadway and vehicle factors. Reducing the severity of injury in crashes is more important than reducing incidence and ranking incidence by broad categories of causes is misleading regarding severe injury reduction. Vehicle and road modifications are generally more effective than behavioral change efforts with the exception of certain laws such as required use of seat belts, motorcycle helmets, and graduated licensing of teenagers. Human factors
Human factors in vehicle collisions include anything related to drivers and other road users that may contribute to a collision. Examples include driver behavior, visual and auditory acuity, decision-making ability, and reaction speed. A 1985 report based on British and American crash data found driver error, intoxication, and other human factors contribute wholly or partly to about 93% of crashes.
A 2020 study conducted by INRIX, private company that analyzes traffic patters, behaviors and congestion, showed that as traffic levels returned to normal during the three-month period August to October 2020, growth in collisions (57%), outpaced the growth in miles traveled (22%) resulting in a higher than normal collision rate during this period.In France, the Ministry of Interior reported that traffic incidents, crash-related injuries, and fatalities dropped in 2020 compared with 2019. Fatalities dropped 21.4%, injuries dropped 20.9%, and incidents overall dropped 20%. In the same report, the ministry reported that the number of vehicles on the road dropped by 75%, which would indicate that the rate (incidents per vehicle-mile) in fact increased. Other
Other possibly hazardous factors that may alter a drivers soundness on the road include:

Irritability
Following specifically distinct rules too bureaucratically, inflexibly or rigidly when unique circumstances might suggest otherwise
Sudden swerving into somebodys blind spot without first clearly making oneself visible through the wing mirror
Unfamiliarity with ones dashboard features, center console or other interior handling devices after a recent car purchase
Lack of visibility due to windshield design, dense fog or sun glare
People-watching. Traffic safety culture, a variety of aspects of safety culture could impact on the number of crashes. Prevention
A large body of knowledge has been amassed on how to prevent car crashes, and reduce the severity of those that do occur.