United States Public Roads Administration, Toll Roads and Free Roads (1939)
“ Because they see not only the necessity for improvement on the particular road but also the many competing needs of other roads, and have at their disposal and in view only a certain total sum that they feel must be made to go a far as possible in meeting all needs, the highway authorities construct the road on the existing admittedly restricted right-of-way. The principle of growth asserts itself. New traffic, drawn and generated by the improvement, appears on the road. The road as built soon becomes inadequate to accommodate the greater traffic. ”
