As part of a range of improvements to the 220 service the frequency of the buses during peak hours will also increase from every 30 minutes to every 15 minutes.
From midnight to 6am the service will operate on a 30 min/60 minute frequency.
Core weekend frequency will increase to every 15 minutes from 9am until midnight.
All services will now operate to Grange Manor (Ballincollig) beyond the current terminus of Dell EMC.
At Carrigaline, all services will now serve the Carragaline Primary Care Centre.
Every second service will now operate to Crosshaven.
The timetables for the 200x, 216, 223 and 223x will not change but departure times will be revised to reflect actual journey times.
The Green Party in Cork has welcomed the changes describing them as progressive.
The party's South West ward representative, Colette Finn said it was part of the kind of change necessary to meet Ireland's international commitments on climate change and move to a less car-based economy.
"It is great to see areas such as Ballincollig and Carrigaline becoming more connected to the city centre of Cork and vice versa."
"It gives young adults the service they require at night to enjoy activities within the new city boundary. Speaking as a parent, I know that it will allow my daughter to meet her friends in Ballincollig without depending on me for a lift – here’s hoping!”