PS beam with Temporary shoring

We have a light rail system being expanded in my area, with much of it elevated on cIP concrete T piers. Driving down I-5 today and saw one elevated section with a long center section of PY on temporary shoring, and two shorter PT sections, one at either end of the center section, with both short sections resting on the temporary shoring, and the other end on the T piers. Seems like they intend to create two splices, but with PT beams??? Seems odd to me. If I get a chance, I will take a couple of pictures and post them later. Ever seen this before? The length pier to pier did not seem that different than the other spans. I don’t think this was a casting bed limitation.