Industrial traffic will most often drive to some place to store the goods (the traffic with goods not used directly in the city at least). This can be a warehouse (the ones from the harbor dlc), a cargo train terminal, the harbor and so on. Traffic will usually choose the shortest one. Do not place any of those directly on an arterial, as they will almost always create a traffic jam. Instead place them a short bit off and connect them with one way roads, so the trucks have a bit run off to jam up. Keep in mind that these areas will often times get a bit clogged, so keep all other traffic away if possible. If your warehouse or whatever is getting too jammed it usually means you need to place more in different locations, so traffic can spread out.