Convention (norm) States and in Germany that motorists drive on the right side of the road, whereas in New Zealand and the United Kingdom motorists drive on the left. The standardization of time is a human convention based on the solar cycle or calendar. The extent to which justice is conventional (as opposed to natural or objective) is historically an important debate among philosophers. The nature of conventions has raised long-lasting philosophical discussion. Quine, Davidson, and David Lewis published influential writings on the subject. Lewis's account of convention received an extended critique in Margaret Gilbert's "On Social Facts" (1989), where an alternative
Bicycle boulevard the road are called "rabatstroken". Motorists also ride on this section, yet also have a non-colored part of the road which they can drive on with one half (2 wheels) of the car when they wish to pass a cyclist. Bicycle boulevards may use a variety of traffic calming elements to achieve a safe environment. This makes it difficult for motorists to use the street at a high speed. However, they do not block access to motor vehicles completely (i.e. using bollards) which would designate the route as segregated cycle facilities rather than a bicycle boulevard. Some bicycle boulevards have