combine the express rail and epcot rail, then expand to include HS and AK, using each park as a hub, combine this with your idea of unique transportation servicing each park's hotels. This would eliminate the trans and ticket center as a monorail destinaton, allowing guest to quickly park hop, increasing park hopper sales.
This is very similar to the idea I've had for some time. I would however remove the TTC completely. I think for a transportation system to be efficient the MK park & ride operation has to go to free up the resources. I made this diagram a while back to illustrate my idea.
Not enough capacity for a single rail to service two (or more) parks. At open/close those 340ish capacity trains fill up in a hurry. Imagine the complaining when the full trains from the previous park go whizzing by the other park on its way back to parking.
Each park has to have its own line back to a hub.
This is one of the biggest misconceptions around these boards. "Fixed" rail systems are never as fixed as they seem. Why do people think WDW "traffic flow" is any different than rush-hour in the biggest cities in the world which use rail to get around. You add more trains to the track as rush hour ramps up from the terminals or you insert trains via spurs further along the track. It's done everywhere in the world. In fact it's been done for the last CENTURY in cities like London, Paris, and New York. This isn't rocket science here. Trains or any fixed-guideway system with its own right-of-way are monumentally more efficient at moving large sums of people quickly. There really isn't any debate about it.
It isn't the same. Those systems in those cities run different trains for different routes. Not all the people are going the exact same direction at the same exact time. This would be like everyone in the NYSE getting on the same exact subway train at 4:40. They don't.
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The other thing that never is considered in these threads are the OTHER things on WDW property that currently have buses. Most notably the water parks, but also you can get the bus from DAK to WWoS, so something would need to be available there. They wouldn't want to run a monorail loop all the way to WWoS since no one goes there.
The biggest problem is creating a system that doesn't use buses at all.
If you're going to make a guest get on a bus to transfer to a monorail, might as well just have the bus take them to the park. So you're talking running the monorails to ALL the resorts. This means four 'main' loops, one for each park. You don't need monorail service from Epcot area resorts to Epcot or DHS, so thats a plus. You could probably place Coronado and AKL on the DAK line, which is also good. Might have to do a 'reserved cars' type of thing for guests of those resorts, but that wouldn't be a big deal.
As stated, you would turn Downtown Disney into sort of a 'TTC2' configuration as well, serving as a hub for DAK and DHS. Run one line between TTC and TTC2 for transfers, that gets people between the two places. Yes, they will have to transfer twice to get from MK to AK, but Epcot to DHS they could take the International Gateway to get between the parks.
Then you have to run loops from each of the resorts to each of the hubs - which means
1) MK area resorts - one new line to TTC2
2) Epcot area resorts - two new lines - one to DAK and one to TTC or direct to MK (remember, these resorts on the back side of Epcot - can't ALWAYS go through the park)
3) DAK and Coronado Springs - two new lines - TTC1, TTC2 (with loop to DAK)
4) Moderate resorts - two new lines TTC1, TTC2
5) Value resorts - two new lines - TTC1 and TTC2
6) Other attractions - can either build them into the nearby lines (not ideal) or build separate lines from the nearer TTC
Thats the major buildout. From there you can add on the other things I've missed. Maybe when I have some time I'll draw this up and estimate the number of miles.
Revision: Since Epcot is, in reality, so close to DTD, it would be better to run most of the Epcot traffic through there.