There's a few road related HDRIs on Greg's site, but nothing Freeway oriented... at least not that I saw.
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There is this product for Daz, but of course that'll be a lot more resource intensive than an HDRI...
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It'll give you better control over the camera angles, locations and such at least.
I came across this, but it's pricey...
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I'm sure others will chime in with some suggestions.
As for the Google Earth text, well you'll have to work that out yourself (using a plane primitive or something...)