title: Congestion charging and the walking classes.
authors.forename: Ian
authors.initials: I
authors.lastname: Roberts
mesh_terms: D000063:Accidents, Traffic; D001334:Automobile Driving / Q000331:legislation & jurisprudence*; D005249:Fees and Charges; D006801:Humans; D008131:London; D011634:Public Health; D012923:Social Class; D016138:Walking