Final answer:
The major reason for more traffic accidents at night is difficulties in Scotopic adaptation.
Step-by-step explanation:
One of the major reasons for more traffic accidents at night is difficulties in Scotopic adaptation. Scotopic adaptation refers to the ability of the eyes to adjust to low light conditions. At night, our vision relies heavily on the activity of the rods in our eyes, which are responsible for night vision. However, it takes time for the rods to fully adapt to the darkness, leading to difficulties in seeing clearly and reacting to potential hazards on the road.