Kikar is reporting about an interesting psak from Rav Yitzchak Zilbershtein regarding the ne wtrain line from Tel Aviv to Jerusalem.

Rav Zilbershtein was asked that with the new train line now in operation, the fact that it was constructed with horrible chilul shabbos, are we allowed to use the train line - perhaps because for the first 3 months it is free of charge maybe it is allowed as nobody is profiting or benefiting now and only later when they begin charging for riding the train will one have to stop using it for as many shabbos days as those that were desecrated, or perhaps even now when it is free it cannot be used until "kdei she'yaasu" - the amount of time against the amount of shabbos desecration - has passed?

Rav Yitzchak Zilbershtein responded that perhaps one could find a hetter to use the train, as it isn't clearly know how many shabbatot were desecrated to speed up the train line construction, and perhaps it even caused all the problems the train is now experiencing. Still, a God-fearing person will avoid using the train whose lines were built on Shabbos...

Rav Zilbershtein explains further that it seems to be allowed because nobody can cause land allocated for public use to become prohibited.

Rav Zilbershtein concludes that some think that this train line, bringing the masses of people to Jerusalem quickly is a sign of the impending arrival of Mashiach, though the truth is that when Mashiach arrives he will cancel these disgusting train lines that were built via chilul shabos. How is it possible that one can think that we will travel to the Mikdash via a train that was built via chilul shabbos??