The other way to look at subsidies for transport is per passenger mile : This has data for the US. https://www.newgeography.com/content/006415-transport-costs

The other way to look at subsidies for transport is per passenger mile : This has data for the US. https://www.newgeography.com/content/006415-transport-costs-subsidies-mode https://www.newgeography.com/content/006415-transport-costs-...