Portland’s TriMet launches RD99 in buses running through the region

In Oregon, starting Dec. 2, 2021, all TriMet buses began running on routes throughout the tri-county Portland metro area powered by renewable diesel. TriMet is using a blend of 99% renewable diesel and 1% petroleum. The change in fuels will reduce the carbon dioxide equivalent emissions coming from an individual bus by nearly 99%. When factoring in the upstream emissions of making and delivering the R99 to TriMet’s facilities, the move to R99 will lower the greenhouse gas emissions from TriMet’s fixed-route bus fleet by about 61% compared to the biodiesel blend we had been using.