The answer depends on location, according to previous studies on EVs. The study from NBER evaluated both gas and electric-powered vehicles to determine their effect on the environment. A surprising recommendation is a new road funding option.
Jul 1, 2015 CityLab
A new study estimates there are at least 500 million off-street parking spaces in the U.S. This represents 0.5% to 12% of estimated lifecycle energy consumption and greenhouse emissions, and 24% to 81% other air pollutants.
Dec 13, 2010 Knoxville News Sentinel