Norman Garrick:

Making a city where most trips are done on bikes requires utterly discarding conventional car-centric ways of thinking about transportation. Over the last 60 years, Amsterdam’s leaders, planners and designers have by trial and error created a template for a city where bikes are the dominant force in transportation planning and design. That template has five essential characteristics; skip or short-change any one of them and your city of bikes won’t work as well.
 1. All streets are bike streets
 In most cities, the network of bicycle tracks and lanes is far sparser than the overall street network for vehicular traffic. In Amsterdam, the street network map is the bike network map. Almost all streets in the city have excellent bike facilities of one type or another. What is extraordinary is that in Amsterdam you are more likely to need a specialized car map than a bike map, since many streets have limited or no car access.