[QUOTE="Say"] [QUOTE="jim"] [QUOTE="Dan"] On Fri, 08 Feb 2008 18:42:39 -0800, jim beam wrote: [snip] That law is intended to keep folks from driving 40 on the interstate. It implies that you are to keep up, but without exceeding the speed limit.[/QUOTE] actually, it's "prima facie speed limit" - that means prevailing speed.[/QUOTE] Actually, the "prima facie speed limit" is the POSTED limit. Do a Google search and you'll find a ton of legal references to the concept. The traffic engineers do their studies and establish a "reasonable" prima facie speed which is adopted and becomes the legal limit for a given area.[/QUOTE] the stumbling block for this debate seems to be not understanding what "prima facie" means. in english, "on the face of it" or "on first appearance" would be working translations. if you're trying to make a legal case, something may have prima facie merit to proceed, but those initial facts will be tested in the court. "prima facie" does /NOT/ mean the case is done and dusted. same applies to speed enforcement. there is a prima facie limit of 65 on many freeways in california. but the speed limit enforced by the highway patrol is about 80. and that depends on the weather. bad weather, they'll enforce 65, or lower. no such thing as black and white.