; table of contents. Sec. 2. Extension of alternative fuels credit. Sec. 3. Partial exclusion from excise tax imposed on heavy trucks sold at retail for alternative fuel trucks. Sec. 4. Credit for new qualified natural gas motor vehicles. Sec. 5. Extension and increase of alternative fuel vehicle refueling property credit. Sec. 6. Liquefied natural gas equivalent for purposes of Inland Waterways Trust Fund financing rate. Sec. 7. Federal acquisition of alternative fueled vehicles. Sec. 8. Research, development, and demonstration of natural gas vehicles. Sec. 9. Clean Cities program deployment grants. Sec. 10. Diesel emissions reduction settlement amounts. Sec. 11. Sense of Congress on the Smartway Program. Sec. 12. Sense of Congress on infrastructure and public works projects. 2. Extension of alternative fuels credit (a) In general Section 6426(d)(5) of the Internal Revenue Code of 1986 is amended by striking December 31, 2017 and inserting December 31, 2022 . (b) Outlay payment of alternative fuels credit Section 6427(e)(6)(C) of such Code is amended by striking December 31, 2017 and inserting December 31, 2022 . (c) Effective date The amendments made by this section shall apply to fuels sold or used after December 31, 2017. 3. Partial exclusion from excise tax imposed on heavy trucks sold at retail for alternative fuel trucks (a) In general Section 4051(a) of the Internal Revenue Code of 1986 is amended by redesignating paragraph (5) as paragraph (6) and by inserting after paragraph (4) the following new paragraph: (5) Partial exclusion for alternative fuel trucks (A) In general In the case of any automobile truck chassis, automobile truck body, or tractor subject to tax under paragraph (1) which is fueled wholly or partially by an alternative fuel, the rate of tax shall be reduced by 35 percent. (B) Alternative fuel For purposes of subparagraph (A), the term alternative fuel means compressed natural gas, liquefied natural gas, liquefied petroleum gas, renewable natural gas, hydrogen, and any liquid at least 85