Old and New

The extension to Lechmere opened in 1912, but saw major changes in the first decade of this present century, when a stretch of elevated running near North Station was replaced with an underground route.  The transition point appears in this image.  The old elevated and part of the Science Park station (which was added in the mid-1950s) are to the left.  The much newer infrastructure to the right takes the line toward the nearby subway portal.

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