As a general rule, commercial vehicle drivers should look ahead:

Question

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Commercial drivers should look ahead by at least 12 to 15 seconds. This means the driver is looking at a point ahead of the vehicle where they will arrive within the next 12 to 15 seconds. A good rule of thumb is that at lower speeds, this equals about one city block. However, at highway speeds, it means looking ahead about one quarter of a mile. Looking ahead allows drivers to adjust to any problem or condition that they may be approaching and allows them time to slow down, stop, or maneuver their vehicle safely.

As a General Rule, Commercial Vehicle Drivers Should Look Ahead