^^^^
The *coughs* mean clearing of throat before muttering something which is only for whispering and which has an element of secrecy.
All will be revealed in the fullness of time. It's as SteveP says - He speaks da troof.
My particular solution when approaching the end of the 30/40 zone is to shift from D to M and 3rd or 4th, maintain the limit
until my shoulders are level with the GLF sign, and then floor it in M. Obviously according to road conditions.