The waste tire removal account is created in the state treasury. Expenditures from the account may be used for the cleanup of unauthorized waste tire piles, measures that prevent future accumulation of unauthorized waste tire piles, and road wear related maintenance on state and local public highways. During the 2007-2009 fiscal biennium, the legislature may transfer from the waste tire removal account to the motor vehicle fund such amounts as reflect the excess fund balance of the waste tire removal account. During the 2021-2023 fiscal biennium, appropriations from the waste tire removal account may be made for the department of transportation to address the risks to safety and public health associated with homeless encampments on department owned rights-of-way.