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…Unfortunately for the assumption of the blast coming from underneath, that is almost exactly in the center of the scorched area of the bit that was blown downwards... and is the midpoint more or less of the inter-pier distance. That is the gap before the most northerly expansion joint which failed as well. but without obvious scorching.
There are a bunch of unknowns, known, unknown etc... but the main thing is that the truck is going to be around the midpoint of where the explosion was located. If the truck was doing 120, it would be 33mtrs beyond the epicenter... and it would have gone into the drink on the section of road that collapsed from the western expansion joint. There is a possibility that the truck was past the next pier, and went into the water as the bridge collapsed. That arises as there is a difference in the soot that would be around the position that the truck would have got to at the higher speed... and it is of a truck size masking of the sooting...
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…The truck could be right in the center. The wind was around 16kts steady from the right side... a fireball from below is going to be brought over the same area as is scorched, and as yet we have not seen any of the undersides of the section that collapsed in the V (for Victory).
Yep. The blast ‘shadows’ look to be telling a story. As to the ghosts in the dark areas they could well be from the helicopter water bombers or a fire fighting boat water gun washing the areas. Or there could be a shadow from the prime mover ?