The Clean Miles Standard Program, also known as CMS, is a regulation developed by the California Air Resources Board (CARB) and implemented by the California Public Utilities Commission (CPUC) that seeks to reduce greenhouse gas (GHG) emissions from passenger ride-hailing services operated by transportation networks companies (TNCs) such as Uber and Lyft. With CARB’s vehicle emissions expertise and authority and the CPUC’s authority over TNC permits in the state, the Clean Miles Standard is a joint effort to gradually increase zero-emission miles for TNC services and reduce GHG emissions. The regulation establishes an annual increase in the percent of zero-emission passenger miles traveled and GHG emission reduction targets that TNCs are required to meet.
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