Driver interpretations of existing and potential lane control signal symbols for freeway traffic management /
by Gerald L. Ullman ... [et al.].

APA Citation

Ullman, G. L., United States. Federal Highway Administration., Texas. Dept. of Transportation., Texas Transportation Institute. (1993). Driver interpretations of existing and potential lane control signal symbols for freeway traffic management. College Station, TX: Texas Transportation Institute, Texas A&M University System .

MLA Citation

Ullman, Gerald L, United States. Federal Highway Administration, Texas. Dept. of Transportation, and Texas Transportation Institute. Driver Interpretations of Existing And Potential Lane Control Signal Symbols for Freeway Traffic Management. College Station, TX: Texas Transportation Institute, Texas A&M University System , 1993.