Visual scanningBelgium
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142. Visual scanning
Visual scanning is the driving technique of continuously observing the road ahead, mirrors, side areas and surrounding traffic to identify hazards and changing traffic situations as early as possible. Effective scanning means moving attention regularly between different parts of the traffic environment rather than concentrating on a single point.
Drivers should look well ahead, check mirrors regularly and observe relevant side areas and blind spots, particularly before changing speed, direction or road position.
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Is scanning specifically defined in the Belgian Road Code?
No. Scanning is a driving-observation technique rather than a separately defined legal concept, but effective observation supports the driver's obligations to remain in control and react safely to traffic conditions.
Must Belgian drivers be able to observe traffic behind them?
Yes. Rear-view mirrors must be adjusted so that the driver can observe traffic behind and to the left, including a vehicle that has started overtaking on the left.
Why must Belgian drivers scan the road ahead?
Drivers must adapt their speed to factors including other road users, traffic density, visibility and road conditions and must always be able to stop for a foreseeable obstacle.

Traffic rules
Belgium