higgys

Could an unmarked car stationary on the hard shoulder record how fast your going on the inside lane? Also number plate?

bluenosewrx

iTrader: (2)

yes,using vascar and recording it all.but they shuold have came after you ,then again you could get a nip .good luck,
bluenose.

ADP

to use vascar I beleive they have to follow you to gain an average speed time over distance equation and all that, so if they were sat tight they wouldnt be able to do it.

bluenosewrx

iTrader: (2)

adp,you may be right but they use 2 fixed points must be at least 1/8 of a mile apart as long as they have the distance entered in the equipment it will give a reading (i 'm sure they use the square white marks you see on the road,helicopter vascar is also available,beleive it or not).

T.C

You do not have to be followed on a vascar check and you do not have to be stopped.

Vascar measures speed over distance between two set points and gives an average speed not absolute, and the fact that it was a plain vehicle (enforcement car) makes no odds.

In terms of being stopped, there is no obligation , but it is usually done as a courtesy at which point if you are going to be reported you would be given a verbal NIP. However, if you were not stopped and the intention is to report you, then a written NIP must be sent to the last known registered keeper (which includes current) within 14 days of the commision of the offence.