Should car parks have right-angled or diagonal bays?

A comparison of 45° and 90° bays published by Jim Hill in 1990

A comparison of 45° and 90° bays published by Jim Hill in 1990

Almost all car parks are laid out with right-angled bays, but when a UK mathematician suggested that diagonal bays may be both more efficient and easier to use, he sparked a lively debate. While the University of Salford’s Professor David Percy believed he had come up with a way to make car park designs more user-friendly, engineers at leading car park designers Hill Cannon Consulting have disagreed. 

The case for diagonal bays

Professor Percy suggested that the problem with...

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