Used Heavy- Duty Vehicles and the Environment: A Global Overview of Used Heavy-Duty Vehicles: Flow, Scale and Regulation Used Heavy- Duty Vehicles and the Environment: A Global Overview of Used Heavy-Duty Vehicles: Flow, Scale and Regulation This  Used Heavy- Duty Vehicles and the Environment: A Global Overview of Used Heavy-Duty Vehicles: Flow, Scale and Regulation  report analyses the flow and scale of used heavy-duty vehicles (HDVs) from three major used HDVs exporters – Japan, the European Union (EU) and Republic of Korea (ROK). It also reviews the regulatory environment for used HDVs import in 146 countries, 122 of which are low- and middle- income countries (LMICs). The major exporters of HDVs (used & new) are the EU, Japan, Republic of Korea (ROK), Mexico, the US, and China.