> I tried taking out her fav treats and when we are on the quiet estate she still freaks out
Timing is critical, my 15month old dog has decided car lights are a bit freaky (he too has not been walked in the dark up unitll now). What I am finding to work wonders is, before the dog has chance to get frightened, I offer a treat (exitedly - "whazzzzz thizzzzzzz" in a high-pithced voice), being a foodie, he'll look at the treat, I have this timed to an art where he'll turn his head to me to eat the treat as the car passes, so in only a couple of days he's relaxing allready about carlights, as passing car now = treats.
Failing that, is is possible to sit inside your front door with the dog on a lead and watch the traffic, using distraction and reward to make a positive association, she may be a bit braver inside the front door?