The A40/B1 motorway, also known as the Ruhr motorway, is a special kind of boulevard. It connects the cities, districts and people of the metropolis along a 60-kilometre stretch. It's the region's main traffic artery and has among the highest traffic volume of any motorway in Germany. Three Million visitors made it come to a standstill for six hours as part of the European Capital of Culture RUHR.2010.