### Question
What does traffic signal preemption transmitter mean?


### Answer
**Traffic signal preemption transmitter** has the following meaning in *18 U.S.C. § 39*:

> any mechanism that can change or alter a traffic signal's phase time or sequence

#### Citation:
  - *18 U.S.C. § 39*
  - Heading: **PART I-CRIMES > CHAPTER 2-AIRCRAFT AND MOTOR VEHICLES**

