1. A Policy on Geometric Design of Highways and Streets American Association of State Highway and Transportation Officials National Cooperative Highway Research Program Project 20‐7 Task 14 (in press).
2. A Policy on Geometric Design of Rural Highways American Association of State Highway and Transportation Officials Washington D.C. 1965.
3. Adler B. and Lunenfeld H. Three Beam Headlight Evaluation Report No. HS‐238‐2‐411‐1 AIL Farmingdale N.Y. Jan. 1973.
4. Satisfying Motorists Needs for Information;Alexander G. J.;Traffic Engineering,1972
5. Freeway Operations Institute of Traffic Engineers Washington D.C. 1961.