List of national legal systems
Common law is currently in practice in Ireland, most of the United Kingdom (England and Wales and Northern Ireland), Australia, New Zealand, Bangladesh, India (excluding Goa), Pakistan, South Africa, Canada (excluding Quebec), Hong Kong, the United States (on a state level excluding Louisiana), and many other places. In addition to these countries, several others have adapted the common law system into a mixed system. For example, Nigeria operates largely on a common law system, but incorporates religious law.
Left- and right-hand traffic
Of the 194 countries currently recognised by the United Nations (and the unrecognised Palestine and Kosovo), 140 use RHT and 54 use LHT on roads in general. A country and its territories and dependencies is counted once. Whichever directionality is listed first is the type that is used in general in the traffic category.