>> Also why some people go along at 25mph (in a 30 zone) when there is
>> only light traffic, no pedestrians etc. They always seem to have larger cars too.
>>
Because they want to and it not illegal. At the end of the day they are less of a problem than those who drive at 35 mph in a 30. Having to drive at 5mph less than the speed limit for a mile or so is not going to affect your journey time significantly so don't worry about them.
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