# Vehicle 3D occupation

> Computing the complete 3D swept volume of a vehicle along a route

Source: https://wagonfit.es/series/vehicle-3d-occupation/

[Watch the video on YouTube](https://www.youtube.com/watch?v=f-LgTGYdsSg)

The swept volume is the exact 3D space a vehicle occupies as it moves along a route. Computing it correctly requires working with the full route geometry, combining horizontal alignment, vertical profile and cant at every position along the track.

WagonFit computes the swept volume continuously along the full route, producing a complete 3D representation ready for clearance analysis against infrastructure, design validation or comparative gauging.