Specialist part · #10069 · 2 pts
What factor causes a decrease in a vehicle drivers's field of vision?
aHigh speed.
bGood air transparency.
cToo low speed.
Why?
High speed narrows the driver's effective field of view because attention focuses mainly ahead, making events to the sides harder to notice. On the street shown, this makes it more difficult to monitor adjacent lanes and roadside signs. Clear air improves visibility, while low speed does not cause this narrowing.