The international working group “greening freight” of PIARCs Technical Committee on freight investigated the strategies and measures to reduce greenhouse gas (GHG) emissions of road freight transport. In this article we will discuss the outcome of this work, i.e. a report that describes plans, strategies, and programs for greening, and distinguishes four approaches to reduce GHG emissions. It starts with a description of the global problem of human-induced climate change, depicting the situation in both HIC (high income countries) and LMIC (low- & middle-income countries) around the world. The first of the four approaches to reduce GHG emissions is about having less emissions from each vehicle. The second approach focuses on driving less and transport more goods per vehicle. The third approach deals with changing the transporting demand by vehicles that run on fossil fuels. The fourth approach is the reduction of transport emissions related to the construction sector. The report also presents lessons learnt from history, targets to help shape policy and solutions to implement policies and achieve objectives.