OK, time for some catching up.
If people used the busses, there would be far less congestion. It's not the busses causing the jam-ups, it's all the rental cars.
I really have to ask, what jam-ups

. I have to say, we always have a car and we drive everywhere. Morning, noon, midnight you name the hour and I have driven the roads. I have never been in what I would call traffic or a jam-up. Ok, I take that back. Right after the close of the MK you might actually get stuck in a couple of minutes of traffic out where a few of the roads intersect with I-4, but that isnt what we are talking about. The one area that many talk about being most notorious is over by DTD and the Hotel Plaza Blvd intersection. Maybe others have had different experiences, but in my experience it is not bad over there. I have never been in a big back up. Sure, maybe you get stopped at a light and there are 6 to 10 cars in front of you, but traffic? I wouldnt call that traffic. You get thru when the light turns green, or (gasp) you wait a minute and a half for the next one. It has gotten even better since they re-did the intersection over there. Where are the miles long jam-ups? Where are people getting stuck in a 5 minute back up, much less a longer one?
And when your trying to get to your room at the All-Stars, from your 8pm priority seating at 1900 Park Fair, and the buses stopped running from the MK at 8PM because the park closed at 7PM, and your facing a ride to DD, perhaps it's better to just hop in that rental car.
Hope has hit on the one true inadequacy in the WDW transportation system, IMHO. Resort to resort transportation sucks. Disney should have done something to allow guests to move between resorts without having to make multiple connections that can take an hour plus. Other than that, while we dont use it, the bus system seems to be designed well. Earlier someone commented on how the fact that Disney says you should allow an hour to go three miles is a clear example of how bad the system is. In a way it might be, because there are some routes where that may be the case see Hopes example above. However, to use that example as being indicative of the entire system is unfair. To go those three miles, most trips will last no more than 20 minutes. Furthermore, once you hit the road there will be no delays that add time to the trip. The majority of those 20 minutes will be making stops. If you happen to just miss a bus your trip could be a little longer. Yes, there will be exceptions, but the system as designed isnt terrible, at least not for resort to park movement.
But really, what should the effect be? Is it only to get somebody from A to B?
Yes, Matt I know where you are going. The journey should be just as Magical as the destination. Im sure well get deep into that discussion before too long

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Exactly. If the mass transit isn't adequate enough to convince enough people to skip the rental car, it would seem the mass transit system is not effective.
Im not so sure this is a completely true statement. No matter how great the WDW transportation system is or becomes, there is always going to be a large contingent of people who want to have their own wheels. WDW transportation isnt going to get you to IOA for the day. WDW transportation isnt going to get you to Goodings or Publix for groceries. WDW transportation isnt going to get you to the hospital or clinic should you become ill. There are lots of reasons, other than the inexcusable amount of time it can take to go resort to resort, that people rent cars that cannot be fixed. There are some people who dont want to be bothered driving on vacation. A 20 minute trip from your resort to the AK or MGM is very reasonable. However, if someone can do it in 10 minutes in their car, damn-nab bit they are going to do it.
And the busses to me are a symptom of a bigger problem than giving up on magical transportation like the monorail.
Not to fear, Im sure this topic will consume this discussion in fairly short order, but lets look at a couple other things first.
Look at a map of the property. Did they really take transportation planning into account when locating the various elements? I may be showing my ignorance here, but it doesn't seem so to me. Many of the elements seem haphazardly located. Why is Animal Kingdom so remote, or why is Blizzard Beach so isolated? Better planning could have located the elements so you didn't have to spend a gazillion dollars connecting them.
I honestly believe there is a reason that Walt procured all the land he did. Yes, he wanted to assure that WDW would never be subject to urban attack with unattractive development just outside the berm. However, did he need to purchase all the land he did to achieve that goal? I dont believe so. On the contrary, all that land was purchased to provide room to expand. One can hardly fault Disney for doing that. As for aligning venues better, there is only so much you can do in a given area before you have to move out. Furthermore, I dont find BB all that isolated. It is less than a mile down the road from MGM, it is right across the street from Coronado Springs, and it is probably no more than a quarter mile from the All Stars. Likewise AK and the AKL. First off, AK needed huge tracts of land and probably couldnt be placed in proximity to most other venues. Also, the combination of AK and AKL will serve to help develop that corner of the property so that it isnt viewed as remote in the future. Im sure they paid a lot of people a lot of money to determine land use plans and where new venues would best be located, and Im sure this was done with an eye on the long term.
Theme Park infrastructure
Yes, it was mentioned earlier, and is an interesting topic. I guess it is one of the things we spend most of our time talking about around here, although we never really think of it in terms of infrastructure. But it is, and Ill have to give that angle some thought.
For if the infrastructure of magic was properly (ima)engineered to anticipate the larger crowds in the World, there would have been enough new magical spots created along the way to keep demand for any current spots under control. I see little of this happening.
But there are lots of other Magical spots, spots that didnt exist in 1972. However, that doesnt keep people from learning about and going to the old ones. Is someone going to say Hey, I heard about this cool spot to watch the fireworks over at the CR, but that last spot we happened upon and visited was so Magical that Ill leave that CR thing to other people? I dont think so.
But as usual Mr. Matt and the wonderful Hopemax certainly have hit the mark.
Baron, I hope you have more than the mark Hope and Matt have hit. They make good points, but what are they? 1) Resort to Resort transportation stinks, and 2) WDW should have designed more magical transportation. I have to say, the fact that WDW transportation is not more magical does not, in and of itself, make the existing transportation infrastructure inadequate. Furthermore, if resort to resort is the only knock, can we claim the entire system is kaput? I know you have more to say on the subject.