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
Road pricing in the United Kingdom a much lower charge. The very highest charges would be likely in the most congested urban areas. It is expected that rural motorists would benefit the most from such a scheme, perhaps by paying less through road pricing than they do at present through petrol and car taxes, whereas urban motorists would pay much more than they presently do. However, this is highly dependent on whether such a scheme would be designed to be either "revenue neutral" or "congestion neutral". A revenue neutral scheme would replace (at least in part) petrol and vehicle taxes, and would be such that Treasury