Black or white?

Asphalt - or black - surface

Asphalt - or black - surface

Most of the roads in Switzerland have an asphalt surface. Asphalt for roads is a mixture of bitumen and gravel, chippings, stones and fine aggregates which is produced both naturally and artificially. Natural asphalt is generated when crude oil is heated, enabling particles to evaporate and blend with rock material in a natural process. By contrast, artificially produced asphalt is manufactured by mixing bitumen created through the distillation of crude oil with mineral aggregates.

Concrete - or white - surface

Beton- oder Weissbelag

Transport routes that have to take particularly heavy loads are built from concrete. The concrete surfaces used for roundabouts, bus stops, lorry parks and airports do not suffer from deformation and last considerably longer.