LITTLEAPPLE

I started a city on a large tile in the corner of a region that i was in the early stages of developing (laying infrastructure). The city has developed into something more than a one off and I would like to add two large city tiles to the east and south in order to better create a small metropolis centred around my current corner tile city. Is there a way I can do this? There's probably instructions on how to do this but I've had a good look around and i couldn't find anything. Thanks for any help!

How do you tell when your airport has reached capacity??? Also, is it possible for the planes to taxi from there gate to the runway. Just a suggestion.

I can't build tunnels with my High Speed Rail. Is there a special way I should do this??? thanks...

How do you tell when you need to expand your airport??? At the moment, I have a tiny town (8000) pop in the entire region and it is served by a twelve gate airport. And the airport is EXTREMELY busy. Why??? ANd how do I tell when I need to upgrade???

I have a large number of high wealth sims in my city (200 000+) and they can't find any jobs even though the number of high wealth jobs available to them is almost double their population. I recently downloaded the super ordinance mod and am using the "fastest way to work" ordinance and the "increase commercial office $$$ demand" ordinances. I have also downloaded the NAM PLEASE HELP ps - sorry about the lack of technical info (re; computer specs etc) but i am not very technical

QANTAS??? - please what about other planes - like maybe Airbus A380 or B777 etc???

Sorry that this is a bit off the topic, but can you please stop abbreviating........or is it possible if u could direct me to some abbreviating teaching thread??? sorry