Environment Canterbury (ECan) public transport manager Stewart Gibbon said bus users sit in window seats where possible and record their travel.
Wearing a mask was advised, especially in situations where physical distancing could be difficult, he said.
"We're working to implement the Alert Level 2 restrictions for public transport, but for today, we're focusing on ensuring we can get people home from school and work."
Gibbon said people should avoid travelling at peak times of 7-9am and 2.30-5.30pm on weekdays.
The Bus Interchange remains open.