ALBUQUERQUE, N.M. — Route 66, the historic U.S. highway made famous for attracting gas-guzzling Chevrolet Bel Airs and 1957 Cadillacs traveling from Chicago to Los Angeles, is turning green. The Mother Road has seen in recent months a growing number of electric car charging stations along the 2,500-mile path, and some states even are pushing for solar panels and electric buses. In Illinois, where Route 66 begins, the state has installed a network of electric vehicle charging station from Lake Michigan to the Mississippi River.