On Wednesday, November 30, FMCSA and PHMSA will publish a joint final rule restricting CMV interstate drivers and intrastate hazmat drivers’ use of hand-held cellular phones. The final rule prohibits CMV drivers from holding, dialing, or reaching for a hand-held cellular phone but allows the use of hands-free devices. Drivers may push a single button to initiate, answer, or terminate a call. However, the rule prohibits all push-to-talk functions on cellular phones. Citizen Band Radios, GPS, and fleet management systems are not included in the prohibition.