Texting while operating a CMV is: Question Texting while operating a CMV is: Answers Illegal. Acceptable on rural roads. Acceptable for drivers contacting their employers. Explanation Texting and driving is dangerous for everyone on the road. It is illegal to text while operating a CMV. This questions appears in the following tests: Arizona Class B Knowledge Test Iowa Class B Knowledge Test New Mexico Class B Knowledge Test Oklahoma Tank South Carolina Class A Knowledge Test South Dakota Tank