4.1 Bus Promotion of public transport, improvement of transport infrastructure, setting vehicles’ emission standards and regulations and integrated national transportation planning. The Rwandan transport sector is experiencing a rapid growth of vihicles population and an increase in light duty vehicles equipped with (post-1998 era) 3- way catalytic converters. It is expected that under the busines as usual scenario, the annual increase in population vehicles will reach 16.5% from 12% while light duty vehicles will increase 20% by2030. A high rate increase in population of vehicles and light duty vehicles would lead to the high GHG emission scenarios in the future as explained in the BAU.