AARoads Forum

National Boards => Bridges => Topic started by: NE2 on June 02, 2025, 11:01:04 PM

Title: Are there any bridges that plunge into vertical cliffs?
Post by: NE2 on June 02, 2025, 11:01:04 PM
I've always thought it would be cool to have a road that starts rising from a flat plain on a bridge, and then becomes a tunnel into a cliff where it keeps rising until it breaks the surface of the higher clifftop land. Does this actually happen anywhere? All I can think of that comes close is the ramps between the Harlem River Drive and I-95, but there's no real tunnel (anymore (https://www.google.com/maps/@40.8461701,-73.9319455,3a,31.3y,252.26h,101.38t/data=!3m8!1e1!3m6!1s-wrRIWI73arIc1ilvjbCNg!2e0!5s20220301T000000!6shttps:%2F%2Fstreetviewpixels-pa.googleapis.com%2Fv1%2Fthumbnail%3Fcb_client%3Dmaps_sv.tactile%26w%3D900%26h%3D600%26pitch%3D-11.379437764521455%26panoid%3D-wrRIWI73arIc1ilvjbCNg%26yaw%3D252.26212921354204!7i16384!8i8192?entry=ttu&g_ep=EgoyMDI1MDUyOC4wIKXMDSoASAFQAw%3D%3D)).
Title: Re: Are there any bridges that plunge into vertical cliffs?
Post by: pderocco on June 03, 2025, 02:17:04 AM
I-70 in Wheeling WV crosses the Ohio and then disappears into a tunnel through a ridge. It does touch down a bit before the tunnel, but it's definitely dramatic to drive.
Title: Re: Are there any bridges that plunge into vertical cliffs?
Post by: pderocco on June 03, 2025, 02:22:13 AM
I-80 through Yerba Buena Island in the San Francisco Bay.
Title: Re: Are there any bridges that plunge into vertical cliffs?
Post by: pderocco on June 03, 2025, 02:28:54 AM
I-70 in Glenwood Canyon and De Becque Canyon in Colorado.

I know these might not be quite what you had in mind, but they're definitely direct bridge to tunnel transitions.
Title: Re: Are there any bridges that plunge into vertical cliffs?
Post by: Max Rockatansky on June 03, 2025, 08:05:47 AM
UT 9 descends from a bridge into a cliff at the Mount Carmel Tunnel:

https://flic.kr/p/22fCk4t
Title: Re: Are there any bridges that plunge into vertical cliffs?
Post by: jmacswimmer on June 03, 2025, 10:04:59 AM
Maybe not quite what OP is picturing since there isn't an actual bridge or tunnel, but US 89 ascending Antelope Pass south of Page (https://www.google.com/maps/@36.6655992,-111.6329869,3a,75y,23.96h,94.35t/data=!3m7!1e1!3m5!1syidj7j3MKNNVQ5eY29VLyA!2e0!6shttps:%2F%2Fstreetviewpixels-pa.googleapis.com%2Fv1%2Fthumbnail%3Fcb_client%3Dmaps_sv.tactile%26w%3D900%26h%3D600%26pitch%3D-4.353847576995989%26panoid%3Dyidj7j3MKNNVQ5eY29VLyA%26yaw%3D23.958097982172035!7i16384!8i8192!5m1!1e1?entry=ttu&g_ep=EgoyMDI1MDUyOC4wIKXMDSoASAFQAw%3D%3D) comes to mind - an initial ascent from the valley floor along the side of the cliff ledge (the "bridge"), then a massive rock cut into the cliff ledge while continuing to ascend (the "tunnel"), and finally cresting and continuing onward to Page.
Title: Re: Are there any bridges that plunge into vertical cliffs?
Post by: kphoger on June 03, 2025, 10:42:47 AM
I'm not sure if this is at all the same thing as what you're looking for, but Puente Baluarte, the highest bridge in the Americas, connects directly to a tunnel at its eastern end:

https://maps.app.goo.gl/BM16Q48iQWKyrYxb8
https://maps.app.goo.gl/1zDUGcANRX2jERkk6

And that's not the only such case along the highway:

https://maps.app.goo.gl/vUcwUS6YoorsuRmf8
https://maps.app.goo.gl/9WYRWcRCsanQizcn7
https://maps.app.goo.gl/r3t5dvHeMTh7YYRN6
https://maps.app.goo.gl/68q6axBUD2G5r4Bz6

These two tunnels are connected by a bridge:

https://maps.app.goo.gl/PBnFbS9ydU6iXZcG7
Title: Re: Are there any bridges that plunge into vertical cliffs?
Post by: wriddle082 on June 03, 2025, 10:54:27 AM
What about CA 1 going south out of Pacifica where it goes into the Devil's Slide Tunnels and then suddenly you're on one of the typical cliff side sections of roadway that it's famous for?  Though I'm not sure if there's a bridge involved on either end, but I believe the tunnel does go uphill going southbound.

The old two-lane Memorial Tunnel on the WV Turnpike used to be like this.  The Bender Bridge was immediately south of the tunnel.  That bridge was removed shortly after the bypass was opened, and then the tunnel was repurposed for testing and training purposes.
Title: Re: Are there any bridges that plunge into vertical cliffs?
Post by: Henry on June 03, 2025, 10:35:57 PM
When you leave Downtown Pittsburgh on I-376 WB (formerly I-279 SB), after crossing the Ft. Pitt Bridge you immediately go through the Ft. Pitt Tunnel. Going EB (formerly NB), it makes a nice "aha!" moment as the skyline suddenly appears in front of you.
Title: Re: Are there any bridges that plunge into vertical cliffs?
Post by: ilpt4u on June 20, 2025, 08:01:31 PM
Quote from: Henry on June 03, 2025, 10:35:57 PMWhen you leave Downtown Pittsburgh on I-376 WB (formerly I-279 SB), after crossing the Ft. Pitt Bridge you immediately go through the Ft. Pitt Tunnel. Going EB (formerly NB), it makes a nice "aha!" moment as the skyline suddenly appears in front of you.
City with a Front Door
Title: Re: Are there any bridges that plunge into vertical cliffs?
Post by: Dirt Roads on June 20, 2025, 10:38:47 PM
Quote from: Henry on June 03, 2025, 10:35:57 PMWhen you leave Downtown Pittsburgh on I-376 WB (formerly I-279 SB), after crossing the Ft. Pitt Bridge you immediately go through the Ft. Pitt Tunnel. Going EB (formerly NB), it makes a nice "aha!" moment as the skyline suddenly appears in front of you.

Quote from: ilpt4u on June 20, 2025, 08:01:31 PMCity with a Front Door

Even more impressive when you bring unsuspecting visitors up Saw Mill Run Road and pull the do-loopy to get back to the Parkway West [northbound] so that there is almost no indication that you are so close to downtown.  If you come in on the Parkway West from further west, you can see downtown Pittsburgh off in the distance at several locations.
Title: Re: Are there any bridges that plunge into vertical cliffs?
Post by: Bruce on July 07, 2025, 05:23:23 PM
The I-90 floating bridges across Lake Washington might qualify, as Mount Baker Ridge is a bit more vertical than a hill (but not quite a cliff).

(https://www.mi-reporter.com/wp-content/uploads/2016/11/2751600_web1_160713-MIR-I90.jpg)
Title: Re: Are there any bridges that plunge into vertical cliffs?
Post by: WillWeaverRVA on July 09, 2025, 10:27:25 AM
Quote from: Bruce on July 07, 2025, 05:23:23 PMThe I-90 floating bridges across Lake Washington might qualify, as Mount Baker Ridge is a bit more vertical than a hill (but not quite a cliff).

(https://www.mi-reporter.com/wp-content/uploads/2016/11/2751600_web1_160713-MIR-I90.jpg)

This is kind of what I was picturing when I read NE2's original post. Still pretty cool.
Title: Re: Are there any bridges that plunge into vertical cliffs?
Post by: Mapmikey on July 11, 2025, 08:06:58 PM
This comes pretty close to the literal description in the OP...

E16 between Flam and Voss Norway.  The bridge is not directly into the tunnel but the tunnel is fairly steep uphill (it bypasses the old route which is the steepest road in Norway).

https://maps.app.goo.gl/NFKrhacxEaLWiMGS7

This one near Eidfjord might be better...spectacular bridge directly into tunnels on both ends.  In the direction this view is facing (south) I believe the tunnel does rise to the surface to meet Rv 7.  The other direction also goes directly into a tunnel but just passes through a mountain.  Both tunnels have roundabouts inside the tunnels!

https://maps.app.goo.gl/YSR9WJFSF3PSsNLN6