Just as climate change is likely to raise the sea level, putting the railway between Greystones and Wicklow underwater, the same applies to the DART line between Sydney Parade and Dun Laoghaire. In addition, the DART line between Dun Laoghaire and Glenageary is not conducive to higher speeds due to the curvature caused by the decision of the Dublin and Kingstown Railway to not get an Act of Parliament to build the Atmospheric Railway extension to Dalkey, following the route of the pre-existing Dalkey Quarry tramway instead. In addition, the section from Dun Laoghaire to Sandycove is prone to flooding.
With Irish Rail seeking to fundamentally reconstruct the railway network in Dublin through the building of DART interconnector, now would be the time to shout “Stop” and figure out how a DART network absent the line to Bray would look like.
This is not to suggest that rail based transport to the coastal region of south Dublin be abolished. It would be possible to terminate DART services at Grand Canal Dock and have a new LUAS station immediately south of this, being the northern terminus of a new LUAS line along the existing alignment as far as Sydney Parade, before moving inland to the Rock Road and hence south to Dun Laoghaire and beyond. The existing railway alignment could be taken up again at Sandycove – rebuilding the DART line south of there as a LUAS line. The abandoned railway line from Sandycove to Sydney Parade would be an excellent greenway.
At Bray, the new LUAS line could run on an elevated section above the Dargle, ultimately heading west until it met the new Rosslare Line (see previous post) at which point it would terminate with an interchange station.