### Question
What is the definition of national architecture?


### Answer
The definition of **national architecture** is as follows in *23 U.S.C. § 501*:

> the common framework for interoperability that defines—


(A) the functions associated with intelligent transportation system user services

#### Citation:
  - *23 U.S.C. § 501*
  - Heading: **CHAPTER 5-RESEARCH, TECHNOLOGY, AND EDUCATION**

