Interesting Psak: taking bus on Shabbos to have a baby

As reported by Kikar, Rav Yitzchak Zilbershtein, rav of the Ramat Elchonon neighboorhood of Bnei Braq, recently issued an interesting psak. The information offered feelings somewhat lacking and I would like to know more details of the psak.

Rav Zilbershtein was asked about someone's wife ready to give birth. As Shabbos begins, the fellow asking says he could drive to the hospital, but locally there is a bus operated on Shabbos paid for by the mayor, a free gift to resident sin order to upset the Haredi community. Would it be better to drive ...