When driving at night, how should you adjust your speed?
Correct answer: D – Drive slowly enough to stop within the distance illuminated ahead
The Kansas CDL manual instructs drivers to keep their stopping distance within their sight distance at night. Headlights reveal much less roadway than daylight, particularly when low beams are used. If you drive beyond the distance in which you can stop, an obstacle may become visible too late for you to avoid it safely.
Source: Kansas Commercial Driver’s License Manual (March 2025) — § 2.11.4, “Vehicle Factors”



