Active warning devices

Active warning devices means those traffic control devices activated by the approach or presence of a train, such as flashing light signals, automatic gates and similar devices, as well as manually operated devices and crossing watchmen, all of which display to motorists positive warning of the approach or presence of a train.

Source

23 CFR § 646.204

---

Scoping language

For the purposes of this subpart, the following definitions apply:

---

Is this correct? or