23 C.F.R. § 140.603 Programs.
Title 23 - Highways
Programs covering projects to be financed from the proceeds of bonds shall be prepared and submitted to FHWA. Project designations shall be the same as for regular Federal-aid projects except that the prefix letter “B” for bond issue shall be used as the first letter of each project designation, e.g., “BI” for Bond Issue Projects—Interstate.
Title 23: Highways
PART 140—REIMBURSEMENT
Subpart F—Reimbursement for Bond Issue Projects
§ 140.603 Programs.
