Vehicle Turning Path

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Vehicle Turning Path

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Semi-Trailer Truck - 40' WB
Dimensioned plan drawing of the required layout and turning radius for a Semi-Trailer Truck with a 40' wheelbase

The turning path of a Medium-sized Semi Truck measures the minimum possible turning radius necessary for performing a u-turn in a vehicle with a 40’ (12.2 m) wheelbase.

Measuring the inner and outer radii of the 180° turn, a minimum inner radius of 19’4” (5.9 m) and minimum outer radius between 40’-40’10” (12.2-12.4 m) should be provided for medium-sized semi trucks.

The turning path of a Medium-sized Semi Truck measures the minimum possible turning radius necessary for performing a u-turn in a vehicle with a 40’ (12.2 m) wheelbase.

Measuring the inner and outer radii of the 180° turn, a minimum inner radius of 19’4” (5.9 m) and minimum outer radius between 40’-40’10” (12.2-12.4 m) should be provided for medium-sized semi trucks.

Passenger Turning Path - 180°
Plan drawing with dimensions for the radius required for a passenger vehicle to make a 180° turn

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.

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.

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.

Single-Unit Truck | Bus - 20' WB
Dimensioned drawing showing the requirements for multiple turning angles of a Single Unit Truck or Bus with 20' wheelbase

The turning path of a Single-Unit Truck or Bus measures the minimum possible turning radius necessary for performing a u-turn in a vehicle with a 20’ (6.1 m) wheelbase.

Measuring the inner and outer radii of the 180° turn, a minimum inner radius of 28’4” (8.64 m) and minimum outer radius between 42’-43.5’ (12.8-13.26 m) should be provided for single-unit trucks and buses.

The turning path of a Single-Unit Truck or Bus measures the minimum possible turning radius necessary for performing a u-turn in a vehicle with a 20’ (6.1 m) wheelbase.

Measuring the inner and outer radii of the 180° turn, a minimum inner radius of 28’4” (8.64 m) and minimum outer radius between 42’-43.5’ (12.8-13.26 m) should be provided for single-unit trucks and buses.

Passenger Turning Path - 90°
Dimensioned drawing of measuring the turning path and radius for a passenger vehicle to make a 90° turn

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.

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.

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