| International | |
| European Commission / DG Mobility and Transport (DG MOVE) | |
| ITF (International Transport Forum) | |
| National | |
| Albania | |
| Andorra | Ministry of Public Administration, Transport and Telecommunications |
| Armenia | |
| Austria | |
Azerbaijan | Ministry of Transport, Communications and High Technologies of the Republic of Azerbaijan |
| Belarus | |
| Belgium | |
| Bosnia and Herzegovina | |
| Bulgaria | Ministry of Transport, Information Technology and Communications |
| Canada | |
| Croatia | |
| Cyprus | |
| Czech Republic | |
| Denmark | |
| Estonia | |
| Finland | |
| France | |
| Georgia | |
| Germany | |
| Greece | |
| Hungary | |
| Iceland | |
| Ireland | |
| Israel | |
| Italy | |
| Kazakhstan | |
| Kyrgyzstan | |
| Latvia | |
| Liechtenstein | |
| Lithuania | |
| Luxembourg | |
| Malta | |
Monaco | Ministry of Public Works, the Environment and Urban Development |
Montenegro | |
| Netherlands | |
| Norway | |
| Poland | |
| Portugal | |
| Republic of Moldova | |
| Romania | |
| Russian Federation | |
| San Marino | |
| Serbia | |
| Slovakia | |
| Slovenia | |
| Spain | |
| Sweden | |
| Switzerland | Federal Department of the Environment, Transport, Energy and Communications (DETEC) |
| Tajikistan | |
| The former Yugoslav Republic of Macedonia | |
| Turkey | |
| Turkmenistan | |
| Ukraine | |
| United Kingdom | |
| United States | |
Uzbekistan | |