BusConnects Phase 3 will launch on May 29 and will see the implementation of two northside orbital routes.
The N4 and the N6, which will see the replacement of the 17A, were originally expected to begin in January but were delayed due to driver shortages.
The N4 will be operated by Dublin Bus while the N6 is a Go-Ahead Ireland route.
Read more: New BusConnects routes serving north Dublin delayed by driver shortages
The routes will run in north Dublin with a Monday-Saturday frequency of every 10 minutes.
On Sundays, they will be every 15 minutes during the day and every 20 minutes in the evening.
The N4 will travel from Spencer Dock Luas stop to Blanchardstown Shopping Centre and will serve Killester, Whitehall, DCU, Finglas and Connolly Hospital.
The N6 will go from Kilbarrack to Finglas Village, and will serve Coolock, Beaumont, Ballymun.
Phase 4 and 5 of the BusConnects plan are also expected to launch this year.
Read more: Dublin Bus customers can rate service's reliability and cleanliness in new survey
Read more: Dublin Bus, Irish Rail and Luas fares set to be scrapped in coming weeks
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