Driving means operating a motor vehicle on a public road, including operation while temporarily stationary because of traffic, a traffic light or stop sign, or otherwise, but does not include operating a motor vehicle when the vehicle has pulled over to the side of, or off, an active roadway and has stopped in a location where it can safely remain stationary.
Texting means reading from or manually entering data into a personal wireless communications device, including doing so for the purpose of SMS texting, emailing, instant messaging, or engaging in any other form of electronic data retrieval or electronic data communication.
23 C.F.R. §1200.24