; and (B) the annual median gross income for the State in which the census or tribal block group is located. (7) Rail (A) In general The term rail means any entity transporting goods or passengers operating on the general railroad system of transportation (as defined in Appendix A of part A of title 49, Code of Federal Regulations (or successor regulations)). (B) Exclusion The term rail does not include rapid transit operations in an urban area not connected to the general railroad system of transportation (as defined in Appendix A of part 209 of title 49, Code of Federal Regulations (or successor regulations)). (8) Secretary The term Secretary means the Secretary of Energy. (9) State The term State means— (A) a State; (B) the District of Columbia; (C) the Commonwealth of Puerto Rico; and (D) any other territory or possession of the United States. (10) Zero-emission vehicle The term zero-emission vehicle means a vehicle that produces zero exhaust emissions of any criteria pollutant, precursor pollutant, or greenhouse gas in any mode of operation or condition, as determined by the Administrator. I Clean and renewable energy for all 101. Making public transportation affordable and accessible (a) Establishment The Secretary shall establish a zero-emission vehicle-based public transportation program (referred to in this section as the Program ). (b) Goals The goals of the Program are— (1) to facilitate affordable and accessible zero-emission vehicle-based public transportation; (2) to establish regionally appropriate, interoperable models for zero-emission vehicle-based public transportation in diverse communities throughout the United States; (3) to encourage the innovation and investment necessary to achieve mass market modes of zero-emission vehicle-based public transportation