More DART services are to begin running in from next week following a number of complaints about the new timetables.
Irish Rail introduced the higher frequency services on Sunday, but many passengers have complained about capacity issues since the change.
To tackle the problem, the company has announced two additional services at Portmarnock as well as an extra service at Clongriffin.
Irish Rail spokesperson Jane Cregan is hopeful they will ease any capacity issues:
"During this week it has come to our attention that we do have some capacity issues on the North side of the city, as result of that we will be implementing some changes from Monday next"
"From Monday next we will have service from 07:29am and 07:42am from Portmarnock and 07:45am from Clongriffin."