acp290885
War hero
SparkySteve said:dingerr said:The white marks in the centre of or on either side of the carriageway are used to determine the speed, i believe each mark equates to 5mph when the two photos are compared.
When we used to get tickets in the bomb vans the chief clerk used to send them back to the issuing force unsigned with a standard letter saying we were responding to an incident - never heard of one being chased up.
Surely the mark would equate to a set distance, not a speed?
Both, each mark represents a set distance and speed. When the two photos are taken it is done at a set time difference. You can then use each mark to show the speed the vehicle was doing, the more lines they cover, the faster they are going. When I did my speed safety course after getting caught doing 39mph in a 30mph zone (naughty me), we were told that each mark represents 10mph.