A small airport is at Sion, but the main routes of transport are rail and road. Both networks are large and benefit from tourism. Many of the road passes are well known, such as the Grimsel Pass. The longest land tunnel in the world, the Lötschberg Base Tunnel, will soon be working, in late 2007 perhaps, connecting by rail the town of Frutigen in canton Bern, with the town of Visp in canton Valais/Wallis. This is to better spread car traffic in the highly scenic Kandertal, and also to provide faster transport through the Bernese Alps from the populous Mittelland in the north to the southern canton of Valais. Cars may be loaded onto the trains as freight.