Mibi asks how the freeways work... indeed how should they work?
I am leaning toward giving a bonus for stringing together freeway territories and NOT allowing ranged attacks along freeways, because i just feel that it will wreak havoc on the play of the game. Let me explain...
Consider the San Fernando Valley region. As it now stands it is a 6 territory region with 3 defense points, and four attackers; good for a +3 or +4 bonus. If we allow all freeways to attack territories two spaces out, suddenly the region has 5 points to defend from 11 possible attacking territories.
And it gets worse... San Gabriel Valley would have 6 defense points and 12 possible attackers, Central would have to defend against 1 attackers, and Gateway would have to defend against 19 attackers. I'd consider this overly-open gameplay!
And while we could add some well spaced-out on/off ramps here and there and make it like the New York City map, that's not really how freeways work... especially in LA where the freeways don't always move you around quite as fast as you'd like.

I'm still interested in hearing possible alternatives that would give the map a twist around the freeways.
What I do like is the notion of giving incremental bonuses for stringing together freeways. It would make games in this map progress in two distinct stages: 1) a linear stage of capturing and controlling freeways to get immediate bonuses, and 2) a stage of expansion out from the freeways into the city to capture and control regions. I predict games in which multiple players start by going after one region - Orange County for example - and both collect freeways bonuses while they duke it out for control of the entire region.
I'm torn between giving a bonus for controlling any three connecting freeway territories, or just giving a bonus for connecting territories of the same freeway. Really, the key triples are already falling along a single freeway - bonuses in each valley, three potential freeway bonuses in Orange County, etc. Plus, keeping it along the same freeway makes it much easier to explain and cuts down on the XML headaches; and believe me, the XML will indeed be a headache. Making the freeway bonuses fall along individual freeway lines will require coming up with different colors for each freeway just to keep things straight.
The territory bonuses shown on the map reflect what i have calculated each region to be worth on top of the freeway bonuses you will also collect for holding the entire region. For example, Orange County comes out to be worth +8, so while the +3 looks low you have to remember that there is a +3 and two +1 freeway bonuses that you will collect in addition to the region bonus.