The Kleines Walsertal in Vorarlberg and the village of Jungholz in Tyrol are German customs union territories. Both areas are accessible by road only from German territory. Although the Kleines Walsertal has a relatively long border with the rest of Vorarlberg, high mountains have prevented a road connection being built. In the 1960s and 1970s there were plans for a road tunnel between the Kleines Walsertal and the valley of the Bregenzerach. However, the local population turned down the tunnel, on the one hand, because the Kleines Walsertal would have become a corridor for through traffic and, on the other hand, it would still have been further to the central locations of Vorarlberg than the centres of the Allgäu. The village of Jungholz is only connected at one point with the rest of the Tyrol: on the top of the Sorgschrofen.