Some important news for route planning this year
http://www.cg72.fr/MediasCG72/pdf/Voir.pdfAppologies for the French.
Basically there are now two new payages on the A28 which could be useful for travellers to LM.  One is between Fresnay sur Sarthe and Mamers.  Not immediately obvious that this is of interest, but it does allow anybody who is in a bit of a hurry, to use the motorway but still do the last 30 miles or so of the old N138 and arrive at LM by the more traditional route.
The second is at Parigne l'Eveque which allows a different exit from the motorway on the south side of the city - much more convenient for the circuit and should help the traffic flow considerably.  I'll investigate further and try to place these properly for inclusion in the guide.
Arnage corner has also been resurfaced.