“Among the 6,000 scientific references cited in the report are studies on car-restraint policies and bike-share’s potential for getting people out of cars. An estimated 800 cities globally have operational bike-share schemes, says the report. It adds that London’s congestion charging scheme helped pay for the roll-out of protected cycleways, and that in the charging zone, vehicle kilometers driven decreased by 15% in 2003, the first year it operated, and a further 6% a year later, while CO2 emissions from road traffic had reduced by 20% by 2008.”
2 Curtiram