### Question
How is the term dark territory defined?


### Answer
The term **dark territory** is defined in *49 U.S.C. § 20164* as the following:

> any territory in a railroad system that does not have a signal or train control system installed or operational

#### Citation:
  - *49 U.S.C. § 20164*
  - Heading: **SUBTITLE V-RAIL PROGRAMS > PART A-SAFETY > CHAPTER 201-GENERAL > SUBCHAPTER II-PARTICULAR ASPECTS OF SAFETY**

