simcity-2013
I have a trade port with a freight rail terminal, that I use to export processors.
Because of traffic issues, I do NOT want to export using trucks, especially since the rail capacity is more than enough to export everything.
However, even though I took away ALL delivery truck garages from the trade port, trucks still appear (from the region, I guess) and pile on my traffic problem.
Can I force this trade port to export only using rail?
Here is what I have found so far on this topic:
A small amount of sims will travel between cities for tourism/work on a daily basis, this is the 200ish that you are seeing.
If you want to do some level of massive commute then you need to provide an appropriate interface in both of the cities within the region. What I mean by this is if you have a ferry in one town then you must have one in the other town as well in order to have them be put to proper user. This goes for the other modes of commuting as well; the air port and the bust terminal (Not the shuttle bus, that is travel within the city).
Hope this helps.
Your problem may be you don't have any connecting cities with ferry docks to bring in tourists from other cities. If this is the case I suspect this could be limiting you but cannot say 100%.
Here's some related information about casinos and tourists in general (VERY HELPFUL):
http://www.reddit.com/r/SimCityStrategy/comments/1aa66p/the_skinny_on_tourism_and_gambling/
Best Answer
To force a trade port to only deliver goods using rail connections, simply destroy all of the delivery trucks for that trade port. This can be done by using the bulldozer to destroy the delivery truck garage on the edit building screen.
The suppliers of your trade goods will still be delivered by the building that creates them using their own trucks, but any good that arrive at the trade port will only leave via rail (every 3 in game hours).