CNJ Bridge/Former Trestle over Road and River in High Bridge, NJ

(Satellite, a trestle still stands under the tree-lined embankment.)

CNJ = Central RR of New Jersey 

It appears to be tunnels through a hill. But it is more like culverts through an embankment. Because of the trees, I can't capture the true size of the embankment.

Street View, Nov 2021

We get a better hint of the embankment on the east side.

Street View, Nov 2021

Metrotrails posted two photos with the comment:

Metrotrails Then and Now Series: Historic postcard image of the double culvert carrying Arch Street and the South Branch of the Raritan River beneath the former Central Railroad of New Jersey in High Bridge, New Jersey, compared to the same scene on our 2022 visit.

The Jersey Central built to the town in the 1850s, and the settlement took on the name of the giant trestle that once spanned the site. 

The wooden trestle was rickety and the piers were said to be too far apart, causing the spans to sag when heavy trains passed over. The trestle was then back filled and a culvert placed for the road and river.

Many believe the town was named for a much smaller trestle that served Taylor Wharton, removed in the 1990s, and many have no idea a large trestle is buried in the enormous earthen fill on the south side of town.

Metrotrails shared

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Dennis DeBruler commented on the share
The contour lines on a topo map make it easy to see the valley the embankment crosses.
1954 High Bridge Quad @ 24,000