A "Journal of the Politics of Driving" is NOT an independent study. Every one I have seen that say that (like this one) are untrained people who have an axe to grind -- just like you.
There are independent studies at the link.
I tried to link directly to the page, but they evidently want you to go through their home page first.
1/3 of the way down, on the right is a box called "Popular Studies". Click on "Red Light Camera Roundup". There are dozens of independent studies in PDF format.
Sheesh.