Edit: The report does not include tolls, but I would incorporate tolls into taxes also, especially for lower income groups. One can easily spend $1k to $2k per year in tolls in the Northeast, and I know Texas is quite heavily tolled in some areas as well.
Edit 2: The ITEP report also does not incorporate the effects of property tax laws in CA which give people who purchased land earlier and their descendants a much lower property tax liability (proportionally) than people who purchase land later.