Speed limits have been lowered to 45 m.p.h. on most of N.J. 31 in Hopewell Township. Some sections are 40 m.p.h. and one stretch near traffic light with Delaware Avenue in pennington Borough is 35 m.p.h. This is a heavy semi trailer truck route for truckers going to/from I-95 trying to avoid tolls on the Turnpike. Locals have screamed for heavy and regular enforcement. The route is not part of CMV national network and 102" trucks are banned. Expect enforcement especially after dark and truckers beware: Engine braking is against the local ordinance. No excuses tolerated.