In 2003/4 the council issued 1,051,798 penalty charge notices (PCNs) but since then the figure has dropped to 322,454.
The reduction is attributed to a number of reasons including greater motorist compliance and education, more available payment channels, real-time information and technology.
The council employs traffic marshals who are trained to give advice and, where appropriate, issue PCNs to drivers contravening parking rules.
Penalties are issued for a range of issues including parking in disabled bays, obstructing pedestrian crossings and unsafe manoeuvres such as banned turns.
Each year Westminster provides London Councils with details of its PCN rates. (See table below).
The council is using improved technology, with marshals using hand held devices which contain a full history of previous actions taken against vehicles.
Drivers can use the free ParkRight app to search for available parking spaces in Westminster and pay to park.
Westminster is also using a new fully-automated camera system with Wi-Fi cameras. The new technology enforces 24/7 and captures every contravening vehicle.
Councillor Danny Chalkley, Cabinet Member for City Highways, said: “From busy tourist hotspots in the West End to the quiet residential streets in St John’s Wood, Westminster faces a unique set of parking challenges.
“Our marshals ensure drivers follow the rules which are designed to maintain kerbside space, protect people, reduce congestion and fight London’s air pollution problem.
“The reduction we have witnessed in PCN volumes in the last decade is the result of our commitment to operating firm but fair parking enforcement in Westminster.”
Westminster still issues the most PCNs of any London borough but attributes the numbers to the density of traffic and iconic locations that attract visitors from all over the world.