Commercial truck drivers work in a mobile office. With many in their trucks nonstop for hours or days at a time, the need for instant and reliable communication is significant. While a cell phone may be the obvious go-to device, issues of legality and coverage tend to make two-way radios a better choice. Nevertheless, truckers are required to use the radios safely while driving. A two-way radio has the ability to both transmit and receive a radio signal, as opposed to a radio that can only receive. Operation in half-duplex mode allows the radio to transmit or receive in turn, but not both simultaneously. Full-duplex mode allows the radio to transmit and receive at the same time. Advantages over cell phones include fewer coverage limitations, ease of group communication, longer battery life and higher durability. Furthermore, these systems fall outside the scope of the Federal Motor Carrier Safety Administration’s (FMCSA) rules that limit the use of mobile telephones while driving. The regulations restrict commercial motor vehicle (CMV) drivers from holding a mobile device to make a call, or dialing by pressing more than a single button. CMV drivers who use a mobile phone while driving can only use a hands-free phone located in close proximity. The rules were enacted based on research revealing that the odds of being involved in a safety-critical event such as a crash or an unintentional lane deviation were six times greater for CMV drivers who engaged in dialing a mobile phone while driving than for those who did not. Dialing drivers took their eyes off the road for an average of 3.8 seconds. At 55 miles per hour, that’s the length of a football field. Attempting to dial a phone number is more hazardous than simply pushing a single button to make or receive a call.