The Washington State Transportation Commission (Commission) is responsible for naming state transportation facilities, including highways and bridges. The Commission naming policy states: "A naming is done in a thorough and deliberative manner to honor and institute an enduring memory of a person or group of people who have contributed significantly to the well-being of the state or nation and with the widespread support of the people from the area in which the facility is located."

The naming process can be initiated by the Washington State Department of Transportation (WSDOT), state and local governmental entities, citizen organizations, or an individual providing sufficient evidence to the Commission indicating community support and acceptance of the proposal. Alternatively, the Legislature may pass a joint memorial requesting that a facility be named, at which point the Commission will hold a public hearing to allow public input. After the Commission takes final action, WSDOT designs and installs the appropriate signs.

Cowlitz County Deputy Sheriff Justin DeRosier.  Deputy Sheriff Justin DeRosier served with the Cowlitz County Sheriff's Office for three years and had previously served with the Whitman County Sheriff's Office for three years.  On April 13, 2019, Deputy DeRosier was shot in the line of duty and passed away shortly after midnight on April 14, 2019.

The bill requests that the Commission commence proceedings to designate the section of State Route 411 that traverses Cowlitz County from milepost 1.5 to milepost 12 the Cowlitz County Deputy Sheriff Justin DeRosier Memorial Highway.