The race is on to deploy well over 50 million electric vehicles in the United States over the next 10 years—putting the US transportation sector on the path to limit global warming to 1.5°C. To achieve this scale of deployment, we must seize opportunities to accelerate the rapid decarbonization of the transportation sector. Electrifying transportation network company (TNC) ridehailing vehicles, such as Uber and Lyft, is critical to accelerating the electric vehicle transition and provides key catalytic opportunities: increasing the availability of low-cost, efficient charging infrastructure; lowering EV operational cost; and spreading awareness and education. To electrify ridehailing vehicles at scale, key industry stakeholders must collaborate. Analyzing 100 million miles of actual electric and gasoline ridehailing vehicle data, this report offers actionable recommendations for stakeholders to address three key barriers to implementation.