chrisl

That road is probably pretty floppy when you're driving it with the kind of energy a point explosion of a truck bomb (or bigass missile, for Steve) would put in. It's going to both ripple longitudinally and have twisting modes.  It could walk/bounce itself off to the side a little and then tumble to get the amount of offset that's there.  It also looks like the longitudinal beams sit on small pier blocks on top of the big piers, so it would be tipping off those to one side and could have had enough momentum to tumble as much as it did.

It's 3D data compressed to 2D as a physical part of the data acquisition process, so it's already compressed by the time it hits the detector and lossless compression doesn't reduce the size.  You can do lossy compression, but then you can't get the 3D data back.

That road is probably pretty floppy when you're driving it with the kind of energy a point explosion of a truck bomb (or bigass missile, for Steve) would put in. It's going to both ripple longitudinally and have twisting modes.  It could walk/bounce itself off to the side a little and then tumble to get the amount of offset that's there.  It also looks like the longitudinal beams sit on small pier blocks on top of the big piers, so it would be tipping off those to one side and could have had enough momentum to tumble as much as it did.

The full version had the first sign of flash as just a partial bar at the bottom of the screen (camera refresh artifact), but that is cropped out here. I'm thinking this is just more of an artifact of how the image updates or something.  There is no way the initial explosion was out of the frame there.

Top-scorched.
Bottom not so much:
 

Plus the pan on the remaining roadway is dented downward adjacent to the center of the explosion - it happened on top of the bridge.
That longitudinal steel beam seems to explain the "crease" next to the dent in the remaining roadway about a foot in from the white line - the thin pan was slammed against the stiff beam.
I'd still ride a bicycle across the remaining pavement, and drive inside the lane from the crease in a passenger car, but heavy trucks might accelerate the expansion of some hidden damage and make things interesting.

Not quite.
You're correct that you suspend a bomb 3 feet above the roadway and blow it up, the roadway will reflect the 50% of the energy from the bomb that's going downward back upwards.  But all that energy goes downward first, and the roadway experiences a reaction force equal to the force reflecting back up.  And the roadway then deforms inelastically, turning a bunch of that energy into bent metal, concrete, and shredded end connectors, and a big splash.

It's a single segment of roadway, or maybe a few that were better connected to each other than the next ones out, like a piece of Hot Wheels track, plopped over several piers.  I initially had the impression that they had done single segments to span each gap between piers, but it looks like longer segments that span several.  When you slam a hard force down in between two piers, bending it downward, it pulls the roadway longitudinally and yanks the road out of the end connectors.  It's why it has nice straight separations at the ends with just some rebar sticking out.  

yep I think this is more the point.  It was just demonstrated that the entirety of the southern front is not much better than Kherson.  It is a spectacular psyop mission regardless of how long the bridge is actually out of service. They just made Putin look phenomenally weak... on his birthday.  Another hammer blow to Russian morale and an encouragement to all the Russians and pro Russians in Crimea to utilize what remains of that bridge to leave now.

There should be extra likes available on days when the major bridges fall.

So Russia hires inspectors trained by the TSA?

With a Bill of Lading that says it's 2 tons of Russian explosives intended for Russian forces?  
(edit: It might even be an actual Russian shipment of 2 tons of explosives.)
And the remotely triggered part is too small to notice on the x-ray.

I think the technical term is "That bridge is completely f$$%ed"

There should be extra likes available on days when the major bridges fall.

Rail bridge or road?  Ideally they hit the rail first and leave one road lane open for a while.

With a Bill of Lading that says it's 2 tons of Russian explosives intended for Russian forces?  
(edit: It might even be an actual Russian shipment of 2 tons of explosives.)
And the remotely triggered part is too small to notice on the x-ray.

Appears to have been a truck bomb.
 
 

Good thread here about the prospects for an attack into the 'land bridge', key terrain, etc.
...
 

The nuns of Bayeux have woven swiftly....
 
 

There was a terrible oil rail car explosion in Canada a few years ago. The blast radius was 1km and was devastating incl destroying 30 buildings.
Lac-Mégantic rail disaster
https://en.m.wikipedia.org/wiki/Lac-Mégantic_rail_disaster
I cannot see this getting better for Russia.

This view is good.  But I'm questioning my burning road theory - something on the road should be on fire if it's correct. But it just dropped.
Alternate theory is that the road segments are just resting atop the piers with lateral constraints, but no longitudinal constraint (to allow for expansion) and no vertical constraint (because bridges are heavy and gravity pulling it onto the pier would hold it in place) and the exploding rail car caused enough displacement that the adjacent road segments came unconstrained laterally and moved enough to drop.
 

Oh nevermind, I rechecked, pretty sure the whole bridge is out of action, Russians will have to fly and get a boat back to Russia to get off Crimea.
What a coup by Ukraine. Frankly, all NATO states should apply to Ukraine to renew their membership.

Yeah, no problem lol, just drive along the tracks, then pick your way on foot past the fully laden tank cars that haven't caught ablaze yet, and train your hoses on the.....
 
(Perhaps if we built this large wooden badger)

I kind of wonder if it was more effective than planned.  That it's a burning fuel train isn't a surprise - if they have an insider they could put a GPS triggered bomb on a fuel car far from the bridge, without necessarily even knowing approximately when it would get there, and set a train on fire on the tracks.
I read an article a while back - I don't recall if it was linked here or I found it on search - that pointed out that the bridge is poorly constructed. I may have found the article because I was digging around and the bridge was built way too fast to believe that there was complete engineering done for the seabed mounts.  
Here's a link to the 2017 article I'd read before: Russia’s Crimea Bridge Could Collapse Anytime
And a second article from 2018: Kerch Strait Bridge to "snap in one moment": Expert explains "point of no return"
Looking at the pictures in the OSINT post it's hard to sort out how many places the road is collapsed. The first picture shows two steep "ramps" but the ones that show the rail bridge burning up close show a supported span that's ramping down to one of the landfalls and that's had several of the road spans collapse.
edit: now I see it's the same road span, but the steep ramps are later in time after the spans have fully dropped.  From the buckling of the steel on the rail span it looks like burning fuel might have blown out the side of the tank car onto the road span, and the heat from the fuel (and maybe burning asphalt surface?) weakened the road supports enough to drop.  They look blackened in the Andrew Perpetua post.

man is he punking Putin?