orange tubing, underground

In SEPTA's Juniper Station the other night, waiting for the trolley to West Philadelphia, I noticed the horizontal orange conduit at the top of the photograph running along the ceiling, in contrast to the dark green and dirty light grey of the rest of the wall. I would bet that the orange tubing houses some fiber optic cable, running between buildings above ground, but through the public transit tunnel underneath. On the other hand, the cable might connect to the cellular antenna that provide mobile connectivity in the station, or it work in both scenarios.