Fig. 2
From: The role of the natural and built environment in cycling duration in the Netherlands
Distribution of four types of municipality size in the Netherlands. Municipality size was classified into four classes: the four largest cities, which have > 250,000 inhabitants (i.e., Amsterdam, Rotterdam, Den Haag, and Utrecht); medium-sized cities with 100,000–250,000 inhabitants; small urban areas with 50,000–100,000 inhabitants; and suburban/rural areas with < 50,000 inhabitants