TY - BOOK ED - United States TI - A handbook of highway safety design and operating practices AV - TE 228 .U56 1973 U1 - 625.7 PY - 1973///- CY - Washington PB - For sale by the Supt. of Docs., U.S. Govt. Print. Off. KW - Roads KW - Safety measures KW - Local KW - Accessories N1 - "Guidelines for the relief of other hazards ... will be issued in the future through loose leaf additions to this handbook." ER -