The cars are 1:43 except for the truck and helicopter which are 1:48, these are quite common models 
Lovely board! It looks totally convincing as a city. However, game wise there is a lot of open room with some box-style buildings. How does this work out during your games?
Messy!

The rules system I'm using is an modified version of the Frother's nightmare of frothstreet rules from salute 2009, I've made quite a few amends, additions and new rules, but for the sake of speed of gaming the buildings are as they are.
To spice things up a little once a survivor is in a building it takes AP's to move between the levels, If they are in a building during a zombie activation turn there is a possibility of disturbing one of the undead and having to fight it. Worked very well in practice.
The garage level I just wanted to build to see how the interior's went together and they went together fine.
What you have to remember is that it's a small table, the open spaces were planned.... in all the early games my friend (and me) got complacement and started to try to use the territory...wrong move! We pulled three zed activation cards in a row spawned a total of 35 zombies in those turns and had a very messy time getting out of there.
Also remember that the enemy doesn't shot back so there's no real tactical advantage to be had, having said those 'boxed buildings' as you call em have split levels, open roof sections, potential of occupying and barricading, landing a chopper on and oh yeah.... one in particular blowns up! (using a 12" LP as a blast radius!!!) Can you guess which one?

And hey they might be some box style buildings but they're MY box style buildings and I's like em!

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(Thanks for the question, hope the answers explain my thoughts here).
Cheers guys for all the comments.
The gas station looks great Commander even without the pumps! Could you please give us a clearer picture of your chain link fence. By the way do you know what scale those cars are?
Rob
Hey Rob,
Did these about 8 years ago. Only used them cause I didn't get time to finish the table proper before my visit to my mates.
The mesh I got from my local railway shop at the time, used plastic sprue for the posts, foamboard for the base, hot glue gun to fix the posts to the base then fuse wire to twist the fencing to the posts. I then used polyfiller, which sand and gravel. All sprayed black and painted up then flocked:

I am going to make some proper uptodate urban ones like the ones I've seen in L4D on the 360 so I'll post up a how to then, but really easy to do once you find the right mesh.
And yup the cars are as said, the only one I've played with was the police range rover:

Did that a while ago too, (old pic sorry).
Will dirty up the rest over time too. Hotwheels bikes are great too, an idea borrowed from Pappa M, again need to paint em up.
Cheers all