DUAL CARRIAGEWAYS
Dual carriageways are high-speed, multi-lane roads where the two carriageways are separated by a central reservation. They demand particular skills, including:
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effective observation (use of all mirrors, blind spots, scanning the near, middle and far distance)
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judgment and planning (safe distances and the two-second rule)
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joining and leaving dual carriageways - use of slip roads
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overtaking the lane discipline
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