At least six trucks were destroyed in a massive fire after a collision near a rural New South Wales highway, with their drivers escaping without serious injuries, police say. Two trucks appear to have collided when entering a roadside rest stop with one crashing into four other rigs just after 5am Tuesday on the Hume Highway near Breadalbane. One of the trucks was carrying eight tonnes of butane cans, resulting in multiple small explosions when fire crews arrived at the scene.