A bus driver should normally scan at least how far ahead?
Correct answer: C – 12 to 15 seconds
Indiana's official CDL manual teaches drivers to look at least 12 to 15 seconds ahead. This provides time to recognize traffic changes and adjust speed or lane position without abrupt action. Drivers must continue checking nearby conditions and their mirrors, shifting attention between near and distant hazards.
Source: Commercial Driver’s License Manual — § 2, “How Far Ahead to Look”

