Bikeway controversies  Controversies have surrounded bikeways, particularly in North America and the United Kingdom and specifically between those who prefer to focus on education rather than separated cycling infrastructure and those who prefer to create dedicated facilities to make cyclists safer and make it more inviting to a wider public. Other dissenters say safety is better served by using the road space for parking. Some detractors argue that one must be careful in interpreting the operation of dedicated or segregated bikeways/cycle facilities across different designs and contexts; what works for the Netherlands won't necessarily work elsewhere. Proponents argue that segregated cycle facilities have been implemented and are both popular and safe. The Netherlands, detractors argue, is a flat country and the compact design of Dutch towns keeps cycling distances short as reflected in the Dutch people's choice of bicycle, i.e. the typical Dutch roadster, which has either no gears or a three-speed hub gear and back pedal brakes. Other countries may have different common urban designs, such as sprawling suburbs, and different cycling cultures where riders may ride bicycles with a wider range of gears and like to travel more quickly, such as those who cycle regularly for sport and exercise, who may choose to ride to incorporate some aerobic exercise into their day. So, while a sidepath system may work for slower cyclists, detractors argue, they might not work for cyclists using faster bicycle types who cannot use such a system safely at their higher normal cycling speeds. However, this is contradicted by members of the Royal Dutch Cycling Union, who state that Dutch competitive cyclists have no problems with training in the Netherlands. The Danish Roads Directorate state that the cycle track system ""functions best when cyclists travel at relatively low speeds"" but what is meant by 'relatively low speeds' is not made clear. There are instances where cycle tracks / sidepaths can accommodate fast cycling as evidenced in this video of a velomobile on a Dutch cycle track. As more cycle tracks are built in North American cities, more research is being conducted on the uptake and safety of cycle tracks. North American cities that have recently installed cycle tracks have seen significant growth in cyclists using these roads. It is useful, therefore, to use North American examples of cycle tracks/side paths and compare them to similar roads used by cyclists. This will provide better data using cyclists on similar terrain and presumably similar bicycles and experience. Cycling activists in favour of vehicular cycling have opposed cycle tracks and paths on the principle that they might not be created with the "fast cyclist type" in mind. The UK’s Sustrans guidelines for the National Cycle Network are based on recreational use with a design user who is an unaccompanied twelve-year-old.