Jim,
You mention me in your piece above as offering to do a study on the variability of friction coefficients of different types of snow. Rightly you say we don't often get much snow here in the South of England (if at all) as you had last winter. In fact of course while you were gripped a jet-stream-induced cold winter, over here we had a succession of rain storms through the winter and many many road race courses were flooded. Races were cancelled and measuring was postponed. You may have read of my investigation of the effect of flood water on the calibration constant described in my post on here.
I find your post completely lacking in any quantitative result from the tests that have been carried out on snow. I would certainly need to see these before I took the method at all seriously. In fact it is not at all clear to me how you expect to get any accuracy at all if you are relying the the jones counter gear wheel been turned by the snow. Would it not be better to mount the jones counter on the drive wheel of a tracked vehicle such as a snowmobile? I have had experience of using a motor powered vehicle with a Jones counter - my electrically assisted bike, which gives really excellent results. If it works on a bike with motor drive I dont see why it should not work at some level of accuracy on a tracked vehicle on snow.
However, before I commit to doing any work at all on this, I want to know how the measurer is going to judge the positions of the road boundaries and keep to the SPR when every thing is covered with feet of snow. I am afraid you have not convinced me at all about this.