49 CFR Parts 37 & 38 - Department of Transportation (DOT) ADA Regulations

(2) In this situation, the public entity should give priority to accessible elements that will provide the greatest access, in the following order:

(i) An accessible entrance;

(ii) An accessible route to the altered area;

(iii) At least one accessible restroom for each sex or a single unisex restroom (where there are one or more restrooms);

(iv) Accessible telephones;

(v) Accessible drinking fountains;

(vi) When possible, other accessible elements (e.g., parking, storage, alarms).