SHC § 223.5

(a) The department shall develop a policy for the use of restroom facilities at safety roadside rests by disabled travelers at those locations on state highways which have separate restroom facilities for disabled persons. The policy shall permit a disabled person to be accompanied in the restroom by his or her attendant, who may be a person of the opposite sex, to assist the disabled person.

(b) The policy shall provide for the design and placement of special signs at the safety roadside rests clearly indicating that it is permissible for a person of the opposite sex to accompany a disabled person into the restroom to assist the disabled person.