[Czech, Polish, Slovenian PMs visiting Kyiv to meet Zelenskiy](https://www.rferl.org/a/ukraine-kyiv-czech-poland-slovenia-visit/31753678.html)

How do the Czech/Polish/Slovenian PMs know their transport isn't going to be attacked? They are after all going through a war zone.

Only thing I can see is that they are going to liaise with the Russians first, but given that they're going to Ukraine to offer support, it seems unusual that Russia will agree.