UPDATE: answered below by Stu and Talyn.
Why would I need escalators? Everything is on Level 0, except my underground conveyor belts on Level -1; those work perfectly in concert with the Level 0 conveyors. My small stands and medium stands are on level 0. Small stands do not have the broken security connection bug.
Yes, I’ve done multiple save/reloads; no joy.
Because jetways only connect to floor 1
Jetway is allways on level 1 (one above ground). so the second you upgrade to jetway your pax need access to level 1 to enter and leave jetway. thats why he asked for escalators. read the devblog. it is mentioned there.
Stu and Talyn: THANK YOU!!!
According to Steam, I’ve got nearly 500 hours in this game. This update causes a whole new learning curve for the new features.
No probs mate, this update has changed the game!
F9
Type motherlode and hit enter. 1m in cash added to your game, no need to hack files to add money.
It truly has. Building an airport is a hole new experience now
Great update! 
Is it correct that it’s not possible to build roads on levels above ground level? It only works on the underground levels i think?
Is it possible to make voids, like an atrium, inside the building?
By the way: The trello board is no longer used. (latest update april 29) 
There’s a sync issue which we’re going to fix today, should be resolved soon!
There’s a sync issue which we’re going to fix today, should be resolved soon!
Unfortunalety it haven’t 
Hasn’t yet?
We’ll let you know once it’s intended to be fixed, always remember that “soon” is Soon™ … 
Yes, it will drop late tonight! 
what happened to the trello?
Currently looking into it, all data is wiped but will be re-populated as soon as possible.
How did it happen?
… but in all honesty, I’m not sure. Something broke on the sync supplier’s end (a third-party app) which has now been fixed and hopefully shouldn’t happen again but the content of the board as been wiped and will look a bit empty for a few days as we roll out new issue tickets. It was due for a clean-out anyway but I would have preferred it in a more controller manner…
Anyway, due to experimental release just now we’re pushing the dev blog until tomorrow.