The narrow coast road that runs between Blackrock and Dún Laoghaire in the south of Dublin used to be busy with car traffic going in both directions.
It could be a precarious route to cycle, especially for families with small children. Too often, impatient drivers would speed to overtake and, at certain times, that was risky because the incessant oncoming traffic.
Then, early this summer, one lane of traffic was removed and replaced with a dual-direction cycling path. In just eight weeks, it was transformed. Today, some 4km of segregated cycling infrastructure with fine views of Dublin Bay and Howth Head runs from Blackrock to Dún Laoghaire and on to Sandymount.