UN Economic Commission for Europe
The work of UN Economic Commission for Europe (UNECE) on transport is exemplary. They have developed among others the network of "E" roads, unification of road signs, and the TIR Convention - just to mention the most important and most known achievements.
The rest of the world (notably European Neighbourhood, Asia and Africa) very often follows, as indeed no other regional body has developed such a comprehensive web of international transport conventions. Therefore we decided to post here links to the most relevant working groups of UNECE:
UNECE transport homepage: http://unece.org/trans/welcome.html
Road safety: http://unece.org/trans/main/welcwp1.html
Transport of dangerous goods: Dangerous Goods | UNECE
Climate change and sustainable transport: Climate Change and Sustainable Transport | UNECE
International agreements: http://unece.org/trans/conventn/legalinst.html