They could do something fun and give the public something like this, but since its the cta that would be asking too much:
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Seriously though, if you really wanted to you could spec those segmented cast girders to have a groove detail say every 6 inches or so and get that joint tolerance to match and it would look like one continuous structure. But that's all fussy and whatnot right? Proceed with the "who gives a shit it will only look like this for another hundred years" approach.