Accident Investigation Calculator

Long Vehicle Cut-in

This page has two sections. Use the top section to calculate cut-in of articulated vehicles, and the bottom section to calculate cut-in for rigid vehicles.

When there are 2 or 3 axles at the rear of the tractor or at the rear of the trailer adopt the average position of the axle group.

The calculated cut-in does not take into account tyre slip.

The distance m can be set to zero if you cannot find its actual value.

Fill in the box(es) above the scroll bar, then enter the radius or move the scroll bar to try different radius. The cut-in will be continuously calculated as the radius is adjusted.


Articulated Vehicle

Distance from 5th wheel to trailer rear axle, d (metres) =

Tractor width, b (metres) =

Tractor wheelbase, p (metres) =

Distance from 5th wheel to tractor rear axle, m (metres) =

Radius, R (metres) = 0 500

Cut-in, (R-X) (metres) =


Rigid Vehicle

Wheelbase, L (metres) =

Radius, R (metres) = 0 500

Cut-in, (R-X) (metres) =


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