text: Figure 2.4 shows a line chart depicting trends in road freight activity, emissions and emissions intensity over the years 1990 to 2030. Historically, activity has increased while emissions have been broadly flat, so emissions intensity has fallen over time; this trend is projected to continue to 2030. Emissions intensity fell from 204 g CO2-e/tonne kilometre (tkm) in 1990 to 148 in 2012 and is projected to reach 101 g CO2-e/tkm in 2030. Activity increased substantially from 87 billion tkm in 1990 to 205 in 2012 and is projected to continue strong growth, reaching 357 billion tkm in 2030. Emissions have risen consistently, from 18 Mt CO2-e in 1990 to 30 in 2012 and [are projected to double, reaching] 36 Mt CO2-e by 2030..