The latest Revised Road Traffic Act took effect in March 12, 2017, and more patients are consulting clinicians for dementia because driver's licenses are revoked upon receiving a diagnosis of dementia. The Revised Road Traffic Act in 2002 dictated that legal restrictions should be applied to driving on the grounds of dementia. In 2009, license holders aged 75 or older became required to take cognitive examinations upon renewing their license. Furthermore, as of 2014, clinicians can voluntarily report to the Prefectural Public Safety Commission when their examinees are found to have dementia. As of March 12, 2017, drivers aged 75 or older whose cognitive examination results indicate the possibility of dementia need to consult a clinician even if they have no traffic violation record. If given a diagnosis of dementia, their driver's license is revoked. Thus, clinicians involved in the treatment of patients with dementia need to familiarize themselves with the Revised Road Traffic Act. In this report, the author describes the impact of the 2017 Revised Road Traffic Act on medical treatment and discusses psychiatric problems.
 <Author's abstract>