NOTE: this method exploits despawning object of the game itself to cut off the unnecessary traffic. NO extra mod requires, all VANILLA !

If you don't want the vehicle to despawn (as it's "cheaty") you can still follow the layout of this guide, but upgrade all the 1-way roads into 2-ways roads.


Aerial view of the district, this will be our sample. The length is 6 tiles with minimum 8 squares between them.



First, we will break down the zone into sections for more easier understanding

As you can see, my industrial zone has 3 sections showed within 3 colored zones.

1. Yellow: The input, either from your other specialized districts or from outside. Here I used cargo trains, for they are faster and hold more stuff in 1 trip, rather than line of trucks.
   
   Yellow connects to Red by 1 way road, whichever the type you prefer. Here I used combination of 6-lanes 1-way, splits into 2 highways (3 lanes) for 2 identical generic industrial zones.
   
   
2. Red: Where things happen. The layout is called snake layout, because it looks like snake game from old Nokia phone. Here I used 6-lanes 2-ways road, so imports trucks can delivery material to mutiple factories, and services vehicles can fully cover all the area.
   
   After delivering material, import trucks will despawn if emptied, because it can not go back to import station (cargo train station), thus eliminated the need of extra trip back, just so it can despawn there.
   
   If there is still extra material left, it will go to BLUE section for export, and also despawn there.
   
   
3. BLUE: where the miracle happens. All the BLUE section is covered with 1-way road, whichever the type you prefer. Here I used 6-lanes 1-way to improve vehicles speed.
   
   After dropping the goods, they can not go back to their owner factories and despawn, thus eliminate the need of extra trips back.
   
   This will also increase the rate of spawning for new vans, for the old one already despawned. Extra goods for days.

No intersection = best intersection. Everything is either go up or down, no traffic light, no waiting. The magic of force despawning.



Here is another example in smaller scale for specialized farming district. Specialized district may not need input cargo bay, provides they produce enough material for processing and generic use.



You should import what is missing direct to your generic industry.

Because the main section is 2-ways road, so you will just need minimum requirement of services for full coverage. Here I have extra pair of fire department and police station just in case.

• The bottom input station also acts as output station for the specialized industry distict down under, that's why it has both in and out 1-way road. But same method is applied, so no truck will ever returning to their owner, thus despawning after loading goods.
  
  
• If you see a long line of vans / truck going into your output station, place an extra station to the OPPOSITE SIDE of the road. 2 of them is enough for a 6 tiles x 6 tiles industry zone, with Space Planning Industry policy, which double the amount of goods they produce.
  
  
• If you place extra station in same side, they will only pick the first one, provides it is the nearest one. Also the first station will now become an input station, because now there is a path from it to the second station. You will not want extra trains dock in it, just so it can release a short trip of vans to the station next to.

One more important thing: the input station MUST HAVE a local fire department near it. Because the way we place the 1-way road, there will be no way for other fire truck to come in and rescure. You can place a T shape road for best vehicle speed when they come out of the station.



You can use this input station for COMMERCIAL zone also. Same method is applied again, after loading goods to store, vans will despawn.

No need local fire department for output station, provides that it has an incoming road to it.

You can use this method in any case you want, but it's best for industry zone, because I will be honest, though it works great, it doesnt look that great. And becase no one will look at your industry district, or atleats it isn't the focus point of your city, so it doesn't need to be pretty.





Thank you for reading ! Feel free to comment, i'll be appreciated !