Careful and Prudent
A new law in Florida allows rolling right turns on red if you are "careful and prudent." That would take a lot of wind out of the sails of the red light camera mafia if Tennessee were to adopt such a law. Of course, the best thing Tennessee could do is ban them.
Word on the street is that a new law will be proposed in Tennessee this year to specifically address the situation where a town (such as Bluff City) annexes a strip of highway and installs speed cameras on it. They will be required to spend the money on safety improvements in the annexed area rather than using it to fund their bloated government.