Can a 18 year old drive log truck?

No, an 18-year-old cannot drive a log truck. To operate a commercial motor vehicle (CMV), including a log truck, in the United States, an individual must be at least 21 years old and hold a valid commercial driver's license (CDL). In addition to the age requirement, there are other qualifications and endorsements required to obtain a CDL, including passing a written test, a skills test, and a medical examination.