Fleets (vehicles operated by a single organisation or under the same ownership) account for just 20% of total light and heavy duty vehicles but are responsible for half of the emissions from road transport. This is because they are driven far more than private cars.The EU is currently revising the regulatory framework to determine both emission reductions efforts and electrification in the road transport sector. What is missing is action to address the demand side of vehicles, i.e. a policy on corporate and urban fleets. To assess what this could look like, T&E commissioned a legal study to examine the feasibility of different options that could be put forward by the Commission.This policy briefing accompanies the legal study and shows that an EU Regulation to set zero emission vehicles quotas is the most appropriate legislative instrument to boost the uptake of zero emission vehicles.