The data series here from the New York Times is really amazing: You can pull up any metro region in the country, see if its emissions are increasing faster or slower than population. Its just a deep, astonishing data collection.
Emissions from driving in the New York metro area grew faster than population between 1990 and 2017, which means emissions per person have increased.
Source: New York Times
Emissions from driving in the Los Angeles metro area grew more slowly than population between 1990 and 2017, which means emissions per person have decreased
