### Question
How is the "historic bridge" defined?


### Answer
The term **historic bridge** is defined in *23 U.S.C. § 144* as follows -

> any bridge that is listed on, or eligible for listing on, the National Register of Historic Places

#### Citation:
  - *23 U.S.C. § 144*
  - Heading: **CHAPTER 1-FEDERAL-AID HIGHWAYS**

