Diesel car can be updated to a train

Diesel cars are of little use in this game because their capacity is so small and they must carry kerosene. The suggestion is that if it were upgraded to a train (which would only involve connecting one or more trailers), its usefulness would be greatly enhanced. In an advanced city, trains can be used to collect more materials from afar to get home.


the other method is to enlarge the capacity of the diesel car.