Fig. 6: 2050 deep decarbonization pathways connecting passenger and freight mobility greenhouse gas (GHG) emissions.
From: Exploring decarbonization pathways for USA passenger and freight mobility
Emissions for passenger (a) and freight (b) travel are shown as black triangles (left) and correspond to the left axes. Pathways to key outcomes are shown in red and correspond to relative values or vehicle market shares scaled to the right axes. These highlighted scenarios are the 50 lowest-emission scenarios in 2050 (2.5% lowest 2050 emissions out of 2000 total scenarios). Demand is measured in relative units to the baseline, with 100% indexed to 2050 demand of 6.6 trillion passenger-miles traveled (a) and 5.0 trillion tonne-miles traveled (b). Freight efficiency is also measured in relative units to the baseline, with 100% indexed to 148 tonne-miles per gasoline gallon equivalent (GGE).
