Original 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, traffic engineers, the environmental lobby,  political parties, the health sector etc.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  see Cycle Path Safety Summary of Research.On the other hand, the proponents of segregated cycling facilities frequently proclaim  as being necessary to the provision of a "safe" cycling environment.Since that time, the extablished cycling lobby has taken a critical and measured view of their utility and value
Edited sentence: In contrast, 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  see Cycle Path Safety Summary of Research.Their proponents, who frequently come from outside the established cycling lobby, almost universally proclaim them as being necessary to the provision of a "safe" cycling environment