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Listed below are all documents and RMI.org site pages related to this topic.
Transportation - Fossil fuel reduction opportunities - substituting alternative fuels for remaining oil needs 3 Items
http://www.rmi.org/RFGraph-Biofuel_supply_curve
Even with Reinventing Fire’s 2050 outlook on oil use, the nation will still need 3.1 million bbl/d of liquid fuel (minus any natural gas used in trucks). While they can't be cost-effectively electrified, planes and heavy trucks can run on second and third generation biofuels that can be produced in sufficient supply at costs below $80/barrel oil equivalent.
http://www.rmi.org/RFGraph-second_gen_biofuel_economics
Key inputs to our biofuel model for key second-generation biofuel conversion processes are outlined in this table.
http://www.rmi.org/RFGraph-natural_gas_heavy_truck_technology
Compressed natural gas (CNG) and liquefied natural gas (LNG) hold great promise over the near and medium-term, especially for buses, medium duty vehicles, centrally fueled fleets, and even class 8 heavy trucks.