Figure 10: Land based transport â potential measures and next stepsKey Assumptions 111. Assumption: 20% efficiency improvement in vehicles to 2050 (per US CAFE standards), and in the Lighthouse Scenario that RMI will shift to using 100% electric vehicles. Sector Definition 112. Emissions are based on approximately 2700 vehicles in Majuro and Ebeye. Air and ship emissions have been modelled but are excluded from this analysis as âpass- through emissionsâ and are therefore not counted in national totals. This is consistent with the RMI GHG inventory done as part of the Second National Communication published in 2015. Scenario Definitions 113. Figure 11 below provides a more detailed description of assumptions used for the scenario projections. Each row represents a measure that may be put in place to reduce emissions.