Government are forever trying to keep up with innovation and new technologies.  In terms of city scapes it could be argued that the car has had the biggest impact of all. We now take for granted the use of traffic lights to regulate flow, of line markings on the road to show which side you should be on or when it is safe to overtake and some of us are old enough to remember when steel studs were used to mark turning points at intersections (happily referred to silent cops). Mark from Dictionary of Sydney joined Alex on Breakfast to talk about the history of road rules