Why is it dangerous to assume a vehicle ahead that just changed lanes will maintain a steady speed?

Pick an answer

1. A driver who just changed lanes may still be adjusting speed, and treating their behavior as predictable too soon can catch you off guard
2. Lane changes have no effect on a vehicle's speed at all
3. It is only a concern in the seconds right after the lane change begins, not for the rest of the time spent driving nearby
4. Vehicles always speed up immediately after changing lanes

Correct!

Not quite. The correct answer is highlighted.