This pertains to all the routes and not just option J but I take it as an example I know.
Sandymount Ave has recently had its road surface upgraded. To have to dig it all up again would seem a waste of resources. Would it be better to choose route choices where the post installation route would offer the ability to bring the surface road quality up to the best standard that the local council wished they had the time, money and traffic disruption reason to achieve. This could be a definite selling idea to locals. Yes your road will be dug up but the entire length of this already poor quality road will be resurfaced to the best quality. The result will be a quieter road from traffic but also your own car will notice the difference in both vibration and service minimisation. Why not choose road routes where the road quality is already poor and in need of replacement but that traffic disruption always impeded the opportunity to have this achieved. This is a win-win for all.
Another route option consideration could be to liaise with Codema/SEAI and have district heating network fitted on an ideal part of the route. The opportunity to run DH plumbing adjacent to your electrical cabling and connect heat sources to heat demand would be of great community and environmental benefit. This is particularly so of poolbeg where there are two heat sources and a plan for DH grid to feed low carbon heat to city centre office buildings and social/affordable/new housing. Codema mapped out Dublin heat sources where the heat is already there to supply, it just needs a DH grid in which to pipe it to demand. DH test pilot schemes have been completed so the experience is there. This heat source from data centres to LEUs would marry with Eirgrids carbon mitigation targets and plans. EU funding is available which would match with gov funding to attract potential investment and deployment. The roadblock to any DH scheme is building a grid in which to expand on later. Later integration from offshore wind in the Irish sea would allow for higher potential demand for any curtailed power and expand offshore wind powers potential customer base.
Heat maps are available from :
https://www.codema.ie/services/district-heating
Finally the idea of project construction. I would like to see the option given on routes for project construction to be done 24/7 so that any route construction could be finished asap vs the more limited daytime construction timeframe. Yes this would increase the operational cost but at a benefit of shorted time frame for traffic/local and business construction. Advance notice of higher noise levels of any overnight construction could be planned out in advance. The disruption will already be significant to the city, business impact and local residents on and adjacent to to the route. Offering the potential for this to be completed faster (with a consequence) could be made and then let stakeholders decide. Honest project timelines based on previous grid install experience in other urban areas would perhaps lend more interest to considering this. We've already seen the timeframes for just a cycle-bus lane in Fairview as an example of what just 8-5am standard business hour timeframes entail.