Correct answer
They may be unable to distinguish traffic-light colours properly when the carriageway is very wide.
It is common for the visual abilities of older people to deteriorate from the age of 65, decreasing by up to 25% in the oldest population. Among other negative effects, this deterioration may mean that they cannot distinguish the colours of traffic-light signals correctly, especially when the carriageway is very wide.
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They usually have few accidents because they are more careful.
They usually have more accidents when accompanied by children.
They may be unable to distinguish traffic-light colours properly when the carriageway is very wide.
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