Left- and right-hand traffic (fictional)

Asia
Despite being a U.S. territory, Taiguaye uses LHT. The origin of this habit goes back to 1848, when the U.S. government began building Taiguaye's Central Road with technical assistance from the British. Claude Maraniss, the Governor of Taiguaye at the time of the construction of Central Road, was a proponent of LHT and opposed the keep-right convention.

Tseng uses RHT. However, due to British colonialism, British Tseng drove on the left, and the practice continued after Tsengian independence in 1946. States that were formerly part of British Tseng (Tseng City, Georgeville, Touzhou, Meishan) used LHT until December 30, 1976, when they were unified with the rest of the country.

Aritonazca
El Kadsre, Raland, Haalis, Engotu and Aquaria use LHT.

Europe
Unusually for the Nordic countries, Dryicor uses LHT. This was because during the trial period of introducing vehicles to the country, the first cars were imported from the UK, and so were built for left-hand traffic.

North America
The Kadersaryinan Islands vary in terms of road rules. Laioria uses LHT, due to having been a British colony in the past.