MACPASS was introduced in 1998 to speed up toll collection and provide a more convenient payment method for bridge users. The MACPASS was such a success that on July 25, 2006 the HDBC announced they were phasing out the use of tokens to reduce idle times at the toll plaza and ensure the capacity of the bridges was not lessened by toll plaza congestion. When the announcement was made, 55% of tolls were already being paid electronically with MACPASS. It is believed that if this number can be increased, greenhouse gas emissions could be reduced due to reduced idle times at the toll plaza, and help alleviate the immediate need for a third harbour crossing by ensuring the full capacity of the existing bridges is utilized.