"Driving." Operating a commercial motor vehicle or motor carrier vehicle on a highway, with the motor running, including while the commercial motor vehicle or motor carrier vehicle is temporarily stationary because of traffic, a traffic control device or other momentary delay. The term does not include operating a commercial motor vehicle or motor carrier vehicle with or without the motor running if the driver moved the vehicle to the side of or off of a highway and halted in a location where the vehicle can safely remain stationary.
"Mobile telephone." A mobile communication device which uses a commercial mobile radio service, as defined in 47 CFR § 20.3 (relating to definitions). The term does not include two-way or Citizens Band Radio services.
"Use a handheld mobile telephone." As follows:
75 Pa.C.S. § 1622