Tucked behind two gates equipped with an automatic license plate recognition system, the four-story terraced home was constructed in the 1820s by architect Decimus Burton and overseen by John Nash, who designed nearby Regents Park.
After the camera system captured each driver's license plate, the bill for the toll would be assessed electronically, with the assistance of motor-vehicle departments from around the country.
The car storage system itself consists of a 5 meter long movable plate that sits between the front and rear wheels, and is short enough to cater for low, roadster type cars.
The system can gather data from security cameras, license-plate readers, radiation detectors and 911 calls and hunt through dozens of existing law-enforcement databases for related information.