More than 2 million plug-in electric vehicles (PEVs) have now been sold to consumers globally. The adoption of these vehicles is being promoted by policy makers due to them having high efficiencies and zero tailpipe emissions. This means they can contribute towards reducing harmful emissions and resource depletion. To encourage consumers to purchase the vehicles policy makers are utilising interventions that increase the convenience and lower the cost of owning a PEV. Governments are investing in PEV recharging infrastructure, allowing PEVs to use HOV, bus or transit lanes, providing parking incentives, giving PEVs toll fee waivers, allowing PEVs to pay lower annual road taxes, and are using disincentives such progressive vehicle fuel taxes. The aim of these interventions is to encourage more consumers to purchase PEVs. There are now numerous studies in the literature that investigate the impact of these incentives on PEV adoption. No study has reviewed these studies with the aim of reaching a conclusive understanding regarding the effectiveness of the incentives. This literature review therefore conducts a systematic review of the literature. The result of this is an understanding of which policy measures are and are not effective in promoting PEV adoption. These conclusions allow policy recommendations to be made which can help policy makers understand which incentives should be used and how.