Autodesk Vehicle Tracking allows you to restrict the turning radius according to superelevation and side friction. This, in conjunction with design speed, means that you can now more accurately predict higher speed paths through roundabouts. We do however urge caution before modelling high speed manoeuvres using Vehicle Tracking; the dynamics of vehicle motion are too complex for a program of this type to fully model so the fact that Vehicle Tracking can generate a theoretical path does not necessarily mean that it can be driven safely. Use your engineering judgement.