In the past the EU has tended to be dismissive of the idea. But in October favourable signals were seen to come from Brussels for the first time. The EU announced that it did not intend to veto any decision on the part of Switzerland to limit road freight traffic. It did however stipulate that Switzerland would have to offer a functional alternative, a reference first and foremost to the completion of the New Railway Link through the Alps with the Gotthard and Lötschberg base tunnels as its core elements.
Source: www.nzz.ch/nachrichten/wissenschaft (de)