Okay, so what is this type of bridge called?

[Chris333]

The 2 bridges I first posted:

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[DKS]

The 2 bridges I first posted:

Thank you for these. They are a great help.

[thomasjmdavis]

Relatively new. I'd say past 40 years or so, about the time tilt-up concrete methods came into vogue. It took combined advances in concrete chemistry and handling equipment to make it happen. That Dutch example you linked is amazing, frankly.

The 40 year period may explain the difference in terms.  I did look it up in a book first published in 1969. My guess would be that Armstrong was using nomenclature he learned in the 1950s  or earlier. I recall "tip up concrete methods"- the college I attended in the early 70s (UW-GB) was opening 1 or 2 buildings a year.  Each one was an architectural experiment, and several were built using tip up walls.  My guess would be that Armstrong was using nomenclature he learned in the 1950s.

[Kentuckian]

Where I’m from we call these wagon boxes.

[Chris333]

The first bridge I posted back when it still had it's PRR handrails
https://www.flickr.com/photos/barrigerlibrary/12223301033/in/album-72157640325270063/

http://www.rr-fallenflags.org/el/dwg/81B-15997.gif


I know recently they use the bridge to load construction debris into open hoppers with an excavator.


Even found this that I took

[up1950s]

I used to call this pair The Rat Hole . I went through this twice a day for 22 years . It connected the Atlantic Branch ( bottom right ) to Jamaica Station .

https://www.google.com/maps/@40.7009584,-73.8029807,74m/data=!3m1!1e3

http://www.trainsarefun.com/lirr/jamaica/jam1970.gif

https://www.google.com/maps/@40.700634,-73.8023993,3a,39.4y,322.52h,97.58t/data=!3m7!1e1!3m5!1sqfgN-fzjqh8dIIYWWIJb0Q!2e0!6shttps:%2F%2Fstreetviewpixels-pa.googleapis.com%2Fv1%2Fthumbnail%3Fpanoid%3DqfgN-fzjqh8dIIYWWIJb0Q%26cb_client%3Dsearch.revgeo_and_fetch.gps%26w%3D96%26h%3D64%26yaw%3D36.592476%26pitch%3D0%26thumbfov%3D100!7i16384!8i8192

[davefoxx]

Yep, reminds me of a Pennsy Flying Junction, too.

DFF

[ncbqguy]

One label for this type of structure would a (concrete) viaduct.

Charlie Vlk

[DKS]

I used to call this pair The Rat Hole . I went through this twice a day for 22 years . It connected the Atlantic Branch ( bottom right ) to Jamaica Station .

https://www.google.com/maps/@40.7009584,-73.8029807,74m/data=!3m1!1e3

http://www.trainsarefun.com/lirr/jamaica/jam1970.gif

https://www.google.com/maps/@40.700634,-73.8023993,3a,39.4y,322.52h,97.58t/data=!3m7!1e1!3m5!1sqfgN-fzjqh8dIIYWWIJb0Q!2e0!6shttps:%2F%2Fstreetviewpixels-pa.googleapis.com%2Fv1%2Fthumbnail%3Fpanoid%3DqfgN-fzjqh8dIIYWWIJb0Q%26cb_client%3Dsearch.revgeo_and_fetch.gps%26w%3D96%26h%3D64%26yaw%3D36.592476%26pitch%3D0%26thumbfov%3D100!7i16384!8i8192

This is crazy--there's a whole bunch of them here, with a road going under them:

https://goo.gl/maps/mXuuFDEzT3PYrpWc9

[Chris333]

Sort of have the blueprints for the one I posted. Here on page 290
https://archive.org/details/railwayage57newy/page/290/mode/2up

They just called it a "skew steel and concrete bridge" and a "tunnel".

On the Lake Erie & Eastern they just called it "crossing number 4"

[DKS]

I thank everyone who has participated in this little venture! Although there may not be a solid consensus on what these things are called, there are enough concrete examples (sorry) to create a useful reference.

[Jesse6669]

In Millvale PA there's a flyover where the B&O crosses the PRR Conemaugh Division.  I used to hang around there when I was a teenager.   Link to map

[Point353]

Although there may not be a solid consensus on what these things are called, there are enough concrete examples (sorry) to create a useful reference.

Culvert may be the term that has been missing from your prior searches.
Try searching for box culvert, along with concrete and/or precast, plus any other relevant descriptors, such as underpass, overpass, railroad, highway, etc.

[porkypine52]

Some time ago I happened on this bridge identification site:  BridgeHunter    Very useful for all type of bridges   https://bridgehunter.com/

[John]

https://www.google.com/maps/@40.3319779,-76.9193058,117m/data=!3m1!1e3