Yup - from the looks of it this morning, it was nothing more than replacement of the existing crossing. There are still two or three signal bases that have to be installed before the crossing signals located to the (geographic) east side of the single track can be moved. Perhaps there was some conduit work done during the weekend when the track was dug out, but no way to tell.
Having lived for over a year (some time ago) in view of that crossing, I'm somewhat worried about that intersection with the double track in place. Traffic coming down the hill on Pearson cannot see the other cars entering the intersection unless they stop on the tracks, and the presence of driveways and streets nearly on top of the crossing on both sides makes almost all moves through there tricky. I'm already envisioning the scenario where one train passes, gates start up, cars drive onto crossing only to have them go back down for a second train, and drivers get themselves stuck on the crossing.
Also, at the other end of Andover station, MassDOT is (still, started back around 2010) in the design process to replace the N Main St/Route 28 bridge over the railroad - this is the bridge immediately east of the station. The MassDOT project info gives no indication as to when this will actually go into construction, but it indicates there will be work on the abutments on both sides as well as replacement of the superstructure. Part of me is wondering if the second track through Andover is now waiting for that project.
Wondering if I'll see the Western Route double-tracking finished before I retire...
Photo: Melbourne W7 No. 1019 on Route 78, Bridge & Church Streets, Richmond, Victoria. 10/21/2010