Ok here's what I've come up with after some tweaking. What I've done is practically zero'd out most of the bloom, changed the gamma levels to give a more contrasted image and altered the bloom adaptation levels to try and emulate the way your vision adapts to light when you go under bridges and large signs.
It took me a while to get a good balance between the open wheelers and the tin tops because of the darker cockpits in the tinnys but I'm happy with where Im at so far.
One thing I have noticed is how much the quality of the sky texture can effect the way the light acts, I think I have the best ones available but I've noticed my westhill sky is a lot better than south citys, although south citys dusk is superb. I might look into trying to make different skies for different effect.
Try out the new file especially if you don't like the glowing cars look the bloom can give off as It's almost tweaked out in this version.