Which of the following driver-related factors can contribute to collisions?

Driver-related factors such as stress, fatigue, and distracted driving significantly contribute to collisions because they directly impact a driver's ability to operate a vehicle safely and effectively.

Stress can impair a driver’s concentration, decision-making, and reaction times, leading to increased risk on the road. Similarly, fatigue reduces alertness and slows down cognitive functioning, making it harder for drivers to respond to sudden changes in their environment. Distracted driving, which can include anything from using a mobile phone to adjusting the radio, diverts attention from the road and can lead to accidents due to inattention to crucial driving tasks.

While weather conditions, road construction, and vehicle malfunctions are important factors affecting road safety, they fall more under environmental and mechanical categories rather than being driven by the operator's immediate behaviors and states of mind. Understanding the impact of personal factors like stress and distraction helps drivers be more aware of their mental state and the importance of maintaining focus while driving.