Sadly, the blue trams are currently in a very sad state of despair. They are constantly undergoing maintenance almost constantly. However, the brown ones all seem to be really efficient. Also something to mention back in 2011, the park started installing LED lighting on the brown trams. So I doubt the brown trams will be going anytime soon as they are being upgraded, slowly. But if the park is looking for trams, I think these would be appropriate. http://www.specialtyvehicles.com/vehicle-gallery/new-products/double-decker-buses/