Crissey, Forrest, “Our New Transportation System,” Saturday Evening Post, December 16, 1922, p. 14.
Crosby, W. W., “The Scientific Selection of Pavements,” Municipal Journal, May 29, 1913.
Dalton, James C., “Highways Must Be Made Self-supporting,” Automotive Industries, May 25, 1922.
Good Roads.—“Benefits of a National Highway System,” A committee report of the American Road Builders Association, Jan. 19, 1919.
Haydock, Winters, “The Pittsburgh Traffic Count,” Proceedings of the Engineering Society of Western Pennsylvania, Vol. XXVII, pp. 477-513.
Hirst, A. R., “Laying out Wisconsin Trunk Line Highways,” Good Roads.
Horine, M. C., “Economics of Motor Transport,” Journal of the Society of Automotive Engineers, May, 1922.
James, E. W., “Distribution of Traffic on a Rectangular System,” Engineering Record, Vol. LXXIV, p. 439.
Johnson, A. N., “The Traffic Census,” Public Roads, Dec. 1920, Appendix; also p. 16.
“Traffic Census and its Use in Deciding Road Width,” Public Roads, July, 1921, p. 7.