United States Emissions intensity
Large gains in vehicle engine and transmission efficiency did not result in significant fuel efficiency gains, as cars became heavier. There was little shifting between transport modes (not shown).
European Union Emissions intensity indices—EU27 + Norway, Switzerland, and Turkey
Emissions intensity declined steadily. Passenger transport efficiency improved more than freight transport efficiency. However, within road transport, freight improved three times as much as passenger travel (18% versus 6%) between 1995 and 2010 (not shown).