The world’s population reached 6 billion in 2000 and will be around 9 billion in 2050. Coupled with rising incomes this will lead global mobility to expand strongly through 2050. If infrastructure and energy prices allow, there will be around 3 to 4 times as much global passenger mobility (passenger-kilometres travelled) as in 2000 and 2.5 to 3.5 as much freight activity, measured in ton-kilometres.
International Transport Forum
Finances & Economics