Three more bus lanes will be implemented from Nov 17.
The three locations are along Commonwealth Avenue, Commonwealth Avenue West and Queensway.
These normal bus lanes will operate during peak hours from 7.30am to 9.30am and from 5pm to 8pm on weekdays.
A motorist caught driving in a bus lane during its operation hours can be subjected to a fine of $130.
There are now a total of 22km of full-day bus lanes and 156km of normal bus lanes since the expansion of the bus lane scheme, started in June this year.