Hi, Longdrive down M40 and M25 this weekend. I noticed that at speed, the road noise was unbearably loud. THis was esp on the stretch of the M25 around the A3/M3 South West section Also notice the noise was very speed dependent. I have not noticed road noise before and was wondering if this is a new design feature of road tarmac to encourage sticking to certain speeds. Or could this be something to do with my car?