5 ms·
> In urban, residential and other built-up areas the limit would be cut from 50km/h to 30km/h. > The limit on main arterial routes in towns and cities would be
by dynm 3y ago
> In urban, residential and other built-up areas the limit would be cut from 50km/h to 30km/h.
> The limit on main arterial routes in towns and cities would be capped at 50km/h.
> On national secondary roads, the baseline would fall from 100km/h to 80km/h.
One thing I always wonder with changes like this is, why make such a dramatic change (a 40% reduction in urban areas) in a single step? It seems more sensible to make the the change more slowly and study the results. Or, even better, make the change in half the country and let it run for a year as an experiment. (This could be a multi-armed experiment when you compare to, e.g., increasing enforcement instead.)
- tcfhgj 3y agothese speed limits aren't anything new and their impact is well known
- wiredfool 3y agoBecause speed limits are quantized: 30, 50, 60, 80, 100, 120. The 50->30 (30->20 mph) is a well known baseline 0 change for built up areas. It's meant to be not for major roads, it's meant for neighborhoods and other areas with many pedestrians.
- diffeomorphism 3y agoFirst answer is simplicity: you have a few prototypical road types and speeds and easy to remember round numbers. E.g. 30 signs are common for inner cities, 50 for outer, but 40 or non-multiple of 10 is extremely rare. That is also reflected in gears for cars, i.e. going at those speed requires very little active input by the driver while going at exactly 42 would need constant manual adjustment. > It seems more sensible to make the the change more slowly and study the results. That was already done locally and other countries exist. So you would have to argue what makes Ireland that unique that further experiments are needed.