Passenger Turning Path - 90°

The 90° turning path of a passenger vehicle measures the minimum possible turning radius needed when designing parking, loading, and drop-off spaces.

Measuring the inner and outer radii of the 90° turn, a minimum inner radius of 11’6” (3.5 m) and minimum outer radius of 19’2” (5.85 m) should be provided. Though the turning path requires a width of only 7’6” (2.3 m), additional clearances should be provided whenever possible to accommodate a larger variety of car sizes and driver abilities.

What is the minimum inside turning radius required for making a 90° turn?
A minimum inner turning radius of 11’6” | 3.5 m should be provided for a passenger vehicle making a 90° turn.
What is the minimum width of a path for a passenger vehicle making a 90° turn?
The minimum width of a 90° turning path for a passenger vehicle is 7’6” | 2.3 m based on the front and back overhangs of a typical car.
What is the size of a compact car?
Compact cars are commonly understood as cars with wheelbases less than 9’2” (110”) | 2.8 m. Instead of measuring wheelbases today, the term compact car refers to cars with an interior volume index between 100-109 ft3 | 2.8-3.1 m3.


*Under Development*


Outer Radius: 19’2” | 5.85 m
Inner Radius: 11’6” | 3.5 m
Path Width: 7’6” | 2.3 m minimum

Vehicle Wheelbase: 8’10” | 2.7 m
Vehicle Length: 15’6” | 4.74 m
Vehicle Width: 5’9” | 1.76 m



Drawings include:
Passenger Vehicle 90° Turning Path plan

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The turning radius, or turning path, of a vehicle is the smallest circular turn that it can make. Measuring the diameters of the inner and outer turning circles, turning paths of vehicles are calculated as standards used when designing roads, parking layouts, loading, and public service areas.

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