At night on a dark country road, all that the headlights catch are the shadowy legs the size of tree trunks rising out of the pavement. Standing six feet at the shoulder, weighing up to 1,000 pounds, with massive antlers more than five feet across, moose tower over automobiles and have no fear of them. AP Photo Increasingly the undisputed giants of the northern forest are tangling with traffic as they expand south. Massachusetts motorists hit 52 moose last year, a more than sixfold increase in four years. For decades road officials have relied on warning signs and publicity campaigns...