Understanding the Commercial Traveler Rule
Under the commercial traveler rule, an employee traveling on the employer's business is regarded as acting within the course of employment during the entire period of his or her travel. Workers' compensation coverage applies to the travel itself and also to other aspects of the trip reasonably necessary for the sustenance, comfort and safety of the employee. But the commercial traveler rule does not cover all of an employee's activities. Personal activity not contemplated by the employer might constitute a material departure from the course of employment. (Latourette v. Workers' Comp. Appeals Bd. (1998) 17 Cal. 4th 644, 652.)