Today, the transport sector accounts for almost a quarter of energy-based, polluting CO2 emissions, a share that is expected to grow. If no countermeasures are taken, CO2 emissions from the transport sector are projected to rise by about 70% between 2010 and 2050. NAMAs offer a unique opportunity for developing countries to mitigate greenhouse gas emissions from their transport sectors. They are being considered as an attractive way to overcome barriers to sustainable transport and catalyse the implementation of desired sustainable transport actions. As this report shows, developing countries are increasingly aware of the benefits of engaging with NAMAs, especially with regards to the transport sector.