AutoTURN is a swept path analysis program, made by Transoft Solutions, that simulates how a vehicle moves through a turn so designers can check whether it fits before anything is built.
It runs inside common CAD platforms and draws the path traced by a vehicle’s body and wheels as it follows a route. Designers choose a design vehicle from built-in libraries or define a custom one, then drive it through ramps, aisles, curb returns and loading areas to find conflicts with columns, walls and parked cars.
How it is used in parking design
- Ramps and turning bays. Confirming that vehicles can make the turns between ramps and drive aisles without striking columns or walls.
- Aisles and stall access. Testing whether large vehicles can back into and out of stalls in the chosen parking geometry.
- Service and emergency access. Checking delivery trucks, refuse vehicles and fire apparatus routes through the site.
- Entry and exit lanes. Verifying queuing space and the approach to gates, kiosks and pay-in-lane equipment.
The Parkonomics view
Swept path analysis is only as good as the vehicle you test. Many garages are checked against a design vehicle that is smaller than what actually drives in today, from full-size pickups to crossovers that keep growing. Test the largest vehicle you expect to serve over the life of the structure, including delivery vans and fleet vehicles, not the average car from the year the standard was written.
Related terms: Parking Geometry, Turning Bay, Ramp Slope, Crossover Utility Vehicle, Driving Simulation Software
Further reading: The Evolution of U.S. Parking Structures in 2026