Copenhagen, however, began last month to create the real thing: a system of as many as 15 extra-wide, segregated bike routes connecting the suburbs to the center of the city. These are not bucolic touring paths; Copenhagen’s bike highways are meant to move traffic. Nearly 40 percent of Copenhagen rides a bike to work. On Norrebrogade, a two-mile street in the center of the city, 36,000 cyclists clog the bike lane every day.