Columbia subject headings:
Local transit--England--London Metropolitan Area.
Traffic surveys--England--London Metropolitan Area.
Transportation--Research--England--London.
Harvard subject headings:
Local transit--England--London Metropolitan Area.
Traffic surveys--England--London Metropolitan Area.
Transportation--Research--England--London.
Princeton subject headings:
Local transit--England--London Metropolitan Area.
Traffic surveys--England--London Metropolitan Area.
Transportation--Research--England--London.