For instance, where signals are arranged to provide motor traffic with so-called green waves, this can create "red waves" for other road users such as cyclists and public transport services.[62] Traffic managers in Copenhagen have now turned this approach on its head and are linking cyclist-specific traffic signals on a major arterial bike lane to provide green waves for rush hour cycle-traffic.[65] However, this would still not resolve the problem of red-waves for slow (old and young) and fast (above average fitness) cyclists.