Section 7721 - Operation on streets and highways(a) General rule.--Except as otherwise provided in this chapter, it is unlawful to operate a snowmobile or an ATV on any street or highway which is not designated and posted as a snowmobile or an ATV road by the governmental agency having jurisdiction.(b) Emergency and bridge crossings.--A snowmobile or an ATV may be operated on highways and streets:(1) During periods of emergency when so declared by a policy agency having jurisdiction.(2) When necessary to cross a bridge or culvert.(c) Crossing street or highway.--A snowmobile or an ATV may make a direct crossing of a street or highway upon compliance with the following requirements: (1) The crossing is made at an angle of approximately 90 degrees to the direction of the highway and at a place where no obstruction prevents a quick and safe crossing.(2) The snowmobile or ATV is brought to a complete stop before crossing the shoulder or main-traveled way of the highway.(3) The driver yields the right-of-way to all oncoming traffic which constitutes an immediate hazard.(4) In crossing a divided highway, the crossing is made only at an intersection of such highway with another public street or highway. 1976, June 17, P.L. 162, No. 81, § 1, effective 7/1/1977. Amended 1985, July 11, P.L. 220, No. 56, § 4, effective in 60 days.