Year: see website
Source: Bristol International Airport
Area: Avon, B&NES, Bristol, North Somerset, South Gloucestershire

Link: Bristol International Airport website

Year: 2002
Source: Office for National Statistics
Area: Bristol International Airport

Link: Office for National Statistics website

Year: 2005
Source: Government Offices website
Area: Greater Bistol, Bath, North Somerset, Trowbridge, Chippenham.

Link: Greater Bristol strategic Transport Study website

Year: 2005
Source: Joint local Transport Study website
Area: B&NES, Bristol,North Somerset, South Gloucestershire

Link: Joint Local Transport Plan 2005 website