Original sentence: A 2006 report concludes that "bicycle safety data are difficult to analyse, mostly because bicycle trip data (and thus accident probability per trip) are hard to uncover" (see NCHRP Report 552, 2006, page F-1).In 2007, official claims of safety for cycle tracks provoked a position paper from the umbrella body for UK cyclists' groups stating "Cycle Campaign Network knows of no evidence that cycle facilities and in particular cycle lanes, generally lead to safer conditions for cycling"   On the other hand, the proponents of segregated cycling facilities frequently proclaim them as being necessary to the provision of a "safe" cycling environment, to meet the demands of a large segments of the cycling community that prefers them and to promote the growth of cycling.In addition the Netherlands and Denmark have achieved the highest rates of cycle usage combined with the best records for safety in the world.The safety argument is not easy to resolve.We'll now review direct and indirect safety issues:
Edited sentence: However, in many cases their proponents have no established interest or expertise in cycling promotion and may include representatives of various interests such as the motoring/roads lobbies (including automobile clubs), traffic engineers, the environmental lobby, political parties, the health sector etc.However, the Netherlands and Denmark have achieved the highest rates of cycle usage combined with the best records for safety in the world.In 2007, official claims of safety for cycle tracks provoked a position paper from the umbrella body for UK cyclists' groups stating "Cycle Campaign Network knows of no evidence that cycle facilities and in particular cycle lanes, generally lead to safer conditions for cycling"   On the other hand, the proponents of segregated cycling facilities frequently proclaim them as being necessary to the provision of a "safe" cycling environment.In contrast to such claims, reviews of the international literature suggest a predominant finding associating the use of roadside urban segregated cycle paths with increases, some significant, in the rate and severity of car/bicycle collisions.The argument has two sides involving both direct and indirect safety