I can understand what your saying, but you would be surprised how many spots open up in the closer rows earlier than you would think. The real issue is that by using those far left lots, its a tremendous distance for people who are mobility challenged to walk, just to get to the front entrance. I can see why them might not run the tram on the other tramway. I have walked to the front in the time it takes to load the tram, issue 3 no further boarding spiels, give the safety spiel and drive to unload. Although the mobility customers would say otherwise.
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I did the math on what it costs them to run the trams at MK in this post from 2021:
Do we have trams everywhere? No? But do we have $10 bracelets to remind you who you are? I don’t see one that says “sucker” on it.
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It was $15,360 for labor... With increased labor costs, figure roughly $17K for the day at MK. Epcot would be a lot less due to less trams running.
So at $25 to park, it would take roughly 680 cars to pay the the tram labor for the day at MK.
This analysis doesn't include fuel, maintenance costs or fringe benefit costs.