It is, but if trains can carry cargo across the mountains far faster and cheaper than trucks then it will remove a lot of the heaviest and loudest traffic from the roads. I don’t imagine that the locals are demanding that there be no traffic whatsoever, and tourist traffic is - while not always welcome - much more likely to be beneficial to them than passing cargo. The Bavarian link is definitely an issue, and a substantial one, but also one that they have some time to solve