Effect of increasing the speed limit and associated penalties for heavy vehicles on the Eyre highway.

In an effort to achieve greater compliance with the speed limit, traffic fines and demerit point penalties were substantially increased at the same time for drivers of heavy vehicles apprehended for exceeding the speed limit. The results of the study suggest that the proportion of semitrailers travelling at high speeds on the Eyre Highway is less following the changes in legislation. It is suggested that the current speed limit for heavy vehicles in the Eyre Highway remain at 90 kilometres per hour provided that the increased penalties remain for transgression of this limit.