Congress has approved a measure that will allow makers of three-wheel cars to receive funding for fuel-efficient auto technologies, according to published reports. The bill, which still needs to be signed into law, could be a boost to companies developing alternative car designs, notably Aptera Motors and Elio Motors. Both companies have argued that their three-wheel cars deserve federal funding meant to promote more efficient vehicles. The legislation, passed late last week, would overturn an Energy Department rule that limited funding to four-wheel vehicles meeting emissions and fuel-economy benchmarks, Automotive News reported on Friday. The new guidelines will now allow...