The big problem that has exist in Pa is that many of the enforcement people don't clearly understand the transportation laws for both inter and intra state as well as the agriculture exemptions,construction( Pa.tow behind act of 1981,and so forth)It has been up to the discretion of the enforcement offices at the time of incident.Now because of the public outcry for legislation(gov't to save us from our selves)do we find the noose tightening and states following the Federal guidlines.We are also in the constuction industry and was in to farming and can only say that the state regulations differ from the Federal regs,but when it comes down to legal interpitation the Federal takes president.