Recent research investigated the relative merits of various simulation packages (in particular TRARR, TWOPAS and PARAMICS) for modelling vehicle interactions on rural highways in New Zealand. It assessed their suitability for use as tools for evaluations of crash risk and travel efficiency, particularly prediction of vehicle speeds and bunching in typical highway situations. All were found to have some strengths over the others for particular project applications. Further investigation is required, but it is recommended the use of different simulation packages on rural roading projects be encouraged.