Whiplash is the most common traffic injury, affecting 83% of people involved in motor vehicle collisions. People with whiplash injuries often experience pain and disability that can last for a long period. This may subsequently lead to an increased use of the health care system. Preventing chronic symptoms is a priority for clinicians, insurers, and policy makers. However, there are very few factors that can be changed by treatment to prevent prolonged symptoms. Providing effective care at the appropriate time is one aspect that can be changed and needs to be studied. To date, no randomized clinical trials have investigated the effectiveness of multidisciplinary rehabilitation programs for the management of patients with whiplash-associated disorders. Additionally, there is no evidence to suggest whether rehabilitation programs are superior to physician-based care at improving whiplash-associated symptoms. Thus, there is a need for a randomized trial to determine what program results in the best outcomes for patients.