The CCT opened as the first cashless toll road in Australia. Casual users paid $5.16 if they did not have an e-tag. This caused resentment and controversy, and was abandoned in October 2005 when CCM introduced the first toll-free period. Users without e-tags now pay the standard toll of $3.56 for the main tunnel.
Other Australian toll roads (especially CityLink in Melbourne and Sydney's M7) have clear and well-marketed ways for casual users to pay their tolls. It appears that there has been little or no work done since October to explain or promote ways for casual users to pay the CCT toll.