Here is the Consultation document
https://consultation.dublincity.ie/...c-consultation-on-proposed-special-speed-limi
"Rationale for the proposed phased introduction of 30km/hr zones
The locations identified on drawing No.3369-10 (Phase 1 & 2) are based on our assessment of the traffic environment across the city over the past 18 months against the following criterion;
· Submissions from Elected Representatives and members of the public over the past couple of years;
· Consideration of roads and streets that include an engineered layout and design and the potential for introducing a self enforcing speed limit;
· Assessment against the accident data base and close consultation with the Gardai, and;
· Information from speed surveys of the existing speeds on candidate roads and streets."
You can watch the presentation from the Council engineer here at item 7 - it's about 25 minutes
http://dublincity.public-i.tv/core/portal/webcast_interactive/226785
Sandymount and Portobello were proposed in 2011 but not implemented
Proposals are based on submissions and traffic surveys
30 kph zones are self-regulating - it has to be accompanied by engineering changes (ramps, tightening of corners) and road safety campaigns
If implemented, we will monitor compliance.
Funding has been allocated, so, if approved, we could start implementing by the end of the year.
Reducing speeds is about saving lives.
McCartan - very much in support. A natural progression.
Mannix Flynn - very, very welcome - standard across the world. The environment is less hostile. Much more livable - How are we going to implement it? How are we going to enforce it? What will the penalties be?
Mr Guiney: Are there many pedestrians killed in these areas? How are we going to enforce the new limits?
Engineer: You can make submissions on any area and they will be considered for the next phase.
We have done a lot of speed surveys - so they are credible areas for the new limits. We will monitor after the introduction to see if speeds have come down. We may have to do other engineering solutions if the new limits don't work. The three pillars of road safety: Education, engineering and enforcement.
Again, they are self regulation and self enforcing, so there is no intention to allocate additional Garda resources to enforce them. Speed cameras may be used.
Pedestrians are the most vulnerable - over 50% of fatalities since 2009 are pedestrians. Speed is the main cause of fatalities.
Some other guy: Main streets e.g. Thomas Street will be kept at 50k, but the residential streets will be 30k.
Derek Peppard: This is a visionary proposal.
Engineer: We have no proposals to reduce the speeds on the arterial roads from 50 to 30, but they are open to consultation.
Kieran Binchy: I welcome it. We won't reduce speed by speed limits. We will reduce them by engineering.
Cuffe: We should reduce the speed limits on arterial roads to 40k.