I live in JAX at the moment. You are exactly right! I called 911 a while ago to report a semi that ran a red light on Arlington Expressway after my light was green. Had I or someone else been quicker to enter the intersection, we would have been creamed.
Yep...when I moved there my brother warned me right away NOT to go when the light turns green but wait til those who run the red pass thru...I was amazed how frequently that happened...had he not told me I would have been mowed or dead!
BTW How do you like Jacksonville? Beautiful city thought. I stayed in Mandarin across from St. Johns Bay....then got an apartment close to the Bay.