I recently travelled to Italy from France via the Mont Blanc tunnel. The scenery was amazing and I would very much like to spend more time exploring this region one day. However, it was the cost of the use of the tunnel that was truly amazing!! Nothing was indicated on the road leading to the tunnel entrance. Upon arriving at the peage at the mouth of the tunnel I was asked for the sum of 40.80 EUROS. Naturally I had to pay as I was somewhat committed by that point.......I did wonder just how many times a day the cashier was met with "HOW MUCH!!!" There was a convoy of 3 British cars towing caravans in front of me and I dread to think how much they had to pay. Oh, the 40.80 euros was for one way only!!!
I returned via the San Gotthard Tunnel on my return trip which is FREE
It is quite an expense travelling through this part of the country with the many tolls, but still the cost of the Mont Blanc Tunnel seemed an expense too far. My advise, use the San Gotthard route.