Blue and yellow gap speed cameras in nottingham

Just a quick one, those blue and yellow gap speed cameras in nottingham does anybody know if there set up to tell difference of hgv and car, was doin bout 45 average on single carriage way, speed limit is 50 (obv 40 for me) anybody any ideas , would be much appreciated thank

Depends which road you was on, our company run from nottingham to welbeck quarry up the A614 and rarely drop below 50!!! None have them have been done and we’ve been on that job for a year.