Pub. L. 100-17, tit. I, sec. 109
EMERGENCY CALL BOXES.
SEC. 109. EMERGENCY CALL BOXES.The tenth undesignated paragraph of section 101(a) of title 23, United States Code, relating to the definition of highway safety improvement project, is amended by inserting after “pavement marking,” the following: “installs or replaces emergency motoristaid call boxes,”.