They raised the idea during the negotiations on the Programme For Government
The party examined the impact of cutting the 120 km an hour speed limit for cars and trucks to 110 km.
They say that while it would lengthen travel times it would reduce fuel consumption for people who drive at top speed.
The measure is not included in the Programme for Government however the programme did commit to a review on speed limits.
Cork City Green Party Councillor Dan Boyle says it's just one of a number of suggestions:
