As the weather warms across the West, thousands of off-highway vehicles are warming up as well, preparing for another season of riding the vast web of roads and trails traversing federal lands. But as the Forest Service and Bureau of Land Management begin placing restrictions on off-highway vehicle (OHV) use, such motorized travel will become more restricted just as the popularity of the sport skyrockets.
http://www.nytimes.com/gwire/2009/06/11/11greenwire-long-timelines-enforcement-challenges-hinder-oh-3070.html