Savoy Court in London is the only road where drivers must drive on the right instead of the left.
The arrangement allows taxis dropping off theatre-goers to avoid blocking the hotel entrance and pick up guests conveniently.
An old theory suggests the practice dates back to horse-drawn carriages, allowing women seated behind the driver to alight without walking around the carriage.
To prevent accidents, 'IN' and 'OUT' signs are painted on the ground, but traffic congestion was so severe in the 1960s that a police officer was stationed at the Strand to direct traffic.