Show smaller part of roads carry most of traffic A very large portion of the highway raffle of the country la in carried by a rather small percentage of the roads roada according to the bureau of public ronda roads of tile the united states department of agriculture A detailed traffic survey in maine alaine conducted by the bureau in operation cooperation co with the maine abate highway commission shows chows that the primary system of the state consisting P el only 71 per cent of the total mileage carries per cent of the teafile lu in the state Furt furthermore liermore per cent of the primary system carries per cent of tile the traffic on the tun from this it follows that with respect to the entire highway system of the state 13 1 3 per cent of the total mileage serves more than a fifth of the traffic us ns measured in vehicle miles the important roads of the country are embraced in the federal aid highway system and the state system upon which it has ha lieen been laid down and it la Is tile the I 1 improvement P of these roads for which the country has tile greatest need |