Whatever is said will have the sole objective of maximizing the chances of Boris and his pro rogues being returned to power at the election that will follow soon after.
On railways I'd guess the most likely is some empty promises about reopenings to energise the sub-set of the base that believes we are still in the 1950s. No commitments on HS2 or franchising as they are both conveniently under review and anything that could be said would most likely alienate part of that core vote.
Conceivably some kind of commitment to NPR, but probably one that doesn't cost much and/or can easily be got out of later.
No mention of buses because that core vote doesn't care about them other than getting in the way of their cars. Probably some (re-)announcements of road projects.