On our project to replace Morton Street Over MBTA Commuter Rail in Boston, we specified use of accelerated bridge construction techniques.  The bridge superstructure was replaced during a long weekend.  Prior to that, the contractor built new abutment walls in front of the old ones, and constructed the new superstructure on false work adjacent to the site.  During the replacement weekend last summer, the old superstructure was demolished, precast cap beams were placed on the new abutments, and the new bridge superstructure was rolled into place via self-propelled modular transport (SPMT) units.

 Construction of a similar project we designed, River Street Over MBTA Commuter Rail, is shown in this time-lapse video.  

In updating their maps, Google chose the weekend of Morton Street Construction to take new aerial photographs.  When you Google the site, you can see images of the construction.  The screen capture below shows the new superstructure rolled into place.  The staging area for building the superstructure is seen above and to the right of the bridge crossing.  The false work is still in place.  Highway approaches have not been completed in this photo.  

Commuter rail traffic was back on the tracks that Monday without interuption. After paving, the road was opened to traffic a few days later, ahead of schedule.

Switching to street view (the one where you drag the little avatar icon down on the screen and ground-level photos are shown), the update is a few days later.  At this time, the new replacement bridge is now just open and cars are crossing the span.