### Question
What does equivalent or greater level of safety mean?


### Answer
**Equivalent or greater level of safety** has the following meaning in *49 U.S.C. § 20157*:

> the compliance of a railroad carrier with—


(A) appropriate operating rules in place immediately prior to the use or implementation of such carrier's positive train control system, except that such rules may be changed by such carrier to improve safe operations

#### Citation:
  - *49 U.S.C. § 20157*
  - Heading: **SUBTITLE V-RAIL PROGRAMS > PART A-SAFETY > CHAPTER 201-GENERAL > SUBCHAPTER II-PARTICULAR ASPECTS OF SAFETY**

