Passenger Turning Path - 180°

The 180° turning path of a passenger vehicle measures the minimum possible turning radius for use when designing spaces for u-turns or turn-arounds within streets, parking lots, drop-offs, or service areas. Turning paths can use either curb-to-curb or wall-to-wall measurements based on whether the turning circles are calculated based on the outer tire or the outer front overhang. Additional clearances should be provided whenever possible to accommodate a larger variety of car sizes and driver abilities.

Measuring the inner and outer radii of the 180° turn, a minimum inner radius of 14’5” (4.39 m) and minimum outer radius between 24’-25’6” (7.31-7.77 m) should be provided throughout the turn.

What is the minimum inside turning radius required for a passenger vehicle making a 180° turn?
A minimum inner turning radius of 14’5” | 4.39 m should be provided for a passenger vehicle making a 180° turn.
What is the minimum outside turning radius required for a passenger vehicle making a 180° turn?
The outer turning radius necessary for a passenger vehicle making a a 180° turn should be between at least 24’-25’6” | 7.31-7.77 m based on the circular path made by the front overhang of the car. Additional space should be provided whenever possible.
How big is a typical passenger vehicle?
The average mid-size passenger car, typically a sedan, has an overall length of 15’10” | 4.83 m and a width of 6’ | 1.83 m.


*Under Development*


Outer Radius: 24’-25’6” | 7.31-7.77 m
Inner Radius: 14’5” | 4.39 m

Vehicle Wheelbase: 11’ | 3.35 m
Vehicle Length: 19’ | 5.79 m
Vehicle Width: 7’ | 2.13 m



Drawings include:
Passenger Vehicle Turning Path 180° 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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