However, over Clifton road is just a small spur trail, correct? This isn’t the bridge that needs to happen over library?
Right, the just-installed bridge is on the Bethel Park spur of the trail.
At Library, on the main line of the Montour Trail, the bridge is in place already. They need to convert it from an old railroad trestle to a trail bridge, and build the connecting trail to the east. A note in a recent trail newsletter mentioned that this project had gotten stuck for a while, but was now back on track with a new plan (no details).
Before that happens, they’ll likely install two other bridges, both new, on the main line of the Montour (at the Morganza and Georgetown Road crossings). Those may get done this year with luck.