How far ahead should a commercial driver normally scan?
Correct answer: C – 12 to 15 seconds
Commercial drivers should normally look at least 12 to 15 seconds ahead while continuing to scan nearby traffic. That interval is about one block at lower speeds and roughly one-quarter mile at highway speeds. Looking far ahead provides more time to recognize traffic, signs, and conditions that may require a speed or lane adjustment.
Source: Arkansas Commercial Driver License Manual — § 2.4.1, “Seeing Ahead”

