| yes, it does when followed. If half the road persists in ignoring it, that will result in more accidents. That's the fault of the lawbreakers, not the law.
I don't know what vehicle you drive, but every one I have ever driven gets better mileage at medium speeds. The highway we frequently drive these days has a 55 stretch; during that part, we can see our mpg go up.
Better mileage means less use of gas means lower emissions and less oil dependency. |