2014 Cadillac ELR

A 2014 Cadillac ELR is loaded onto a transport at the General Motors’ Detroit-Hamtramck plant on Tuesday, Dec. 17, 2013. General Motors is joining the voluntary U.S. Environmental Protection Agency Smartway Partnership, which will drive benchmarking of fuel consumption and reduction of emissions by its freight shippers and carriers with the goal of further shrinking the company’s carbon footprint. (Photo by John F. Martin for General Motors)