So on a hunch, I went to the 0,0,0 spot in SF (in front of the Ferry Building) with the default cop car, turned on the lights, and didn't see anything. But, when I zoomed into the front of the light bar, I was shocked when I saw this:
![Image](https://i419.photobucket.com/albums/pp276/dummiesboy/lensday.jpg)
It's not very clear at all, barely noticeable. But, when I tried at night...
![Image](https://i419.photobucket.com/albums/pp276/dummiesboy/lensnight.jpg)
Clearly visible now. However, there is still one more shot I took, zoomed in all the way, looking up.
![Image](https://i419.photobucket.com/albums/pp276/dummiesboy/lensup.jpg)
I found that this effect stays as long as you drive along the positive Z axis. It's much easier to see on addon tracks, when you start directly on the 0,0,0 spot.
So, overall, your car needs to be directly on the positive Z axis facing away from the 0,0,0 spot. Then, take the V-Cam look at the front of the car, and zoom in all the way. Try it for yourself!