(USNW) Commonwealth of Shayden (OLD CJ)

 My best advice for doing a custom airport is to find a real life satellite / bird's eye view of one and copy it using all the great puzzle pieces.  Check out my Sessquenna city journal.  I essentially just copied the Cincinnati-Kentucky International Airport and placed it in the same place on my region map of Cincinnati.

But how is my airport? What's wrong with it?

It looks good, but I recommend making the runways bigger, especially considering how big the terminal and taxiways are.

I've tried making airports for my CJ for my existing cities, but i've found that the most realistic airports take HUGE amounts of space (and no, I'm am so not exaggerating this).  If Glendale Intl is meant to be a small airport, take tigerias advice and build a small terminal, and take some concrete in the middle off to even out the grey and greens.  It would work as a fabulous airport!

However, if Glendale Airport is meant to be a very busy airport with international traffic flying through, I think it's best to erase this airport and start in another city nextdoor, preferably in a 2x2km or 4x4km city tile with lots of flat space.  Most realistic sim-airports could take up a whole entire city lot  In fact, some CJers just call their city tile after an airport.  In a sense, you could say it's not a city with an airport, it's an airport with a city!

For the runways, if it'd be a small airport, your runways are perfectly fine (have a second runway in the middle might look nice too!). If it be a large airports, I'd say long parallel runways with some runways intersecting each other would look fantastic.  This thread might give some inspiration. I think it's the #1 thread for airport ideas on this forums.  I kept it on page 2 cuz there's some excellent examples of terminal road networks.
https://www.simtropolis.com/forum/messageview.cfm?catid=23&threadid=113989&STARTPAGE=2&FTVAR_FORUMVIEWTMP=Linear

Be patient and plan ahead.  Trust me, building a sim airport can be REAL logistical nightmare, but that doesn't mean it's impossible