"When the headroom of an arch or span of a bridge is reduced from its usual
limits but that arch or span is not closed to navigation, the person in control
of the bridge must suspend from the centre of that arch or span by day a
bundle of straw large enough to be conspicuous and by night a white light."
Does that mean the law is not being complied with, in this case, since the bales are hanging from adjacent bridges, not the "centre of that arch or span" itself?
Delays due to trucks striking bridges are a worldwide problem, at least in countries with railroads. Despite yellow black striped reflective panels and height warning signs and sometimes height detectors that trigger flashing red lights.
Perhaps we should try a bale of straw next.
The London Blackwall tunnel has a more modern take on checking height: https://maps.app.goo.gl/b5P5Td1hsuSjLU3w8 traffic signals, barriers like at a railroad crossing, giant panels across the road at height, and a police car on standby to pull out and fine anyone that doesn't read the signs - I presume this happens often enough that they can justify the cost.
But then the bale of straw applied to ships not vehicles and bridges not tunnels.
Your link shows the Dartford Crossing, an M25 bridge miles downstream of the City. The Blackwall Tunnel runs under the Thames at Greenwich and afaik just has the old school hanging metal blocks at height https://maps.app.goo.gl/N5xSF148ggLVTDtS8
It doesn't surprise me too much that police are on standby, a closure of either tunnel or bridge has a major effect on traffic all over London
There are additional traffic lights on the blackwall tunnel further in and a slip road out that can be used for overheight vehicles. I do remember having a 10-15 minute wait once while they sorted things out when a lorry driver got caught.
I'd have a feeling there are automated signs prior to the tunnel (or at least used to be) but I've not been through the tunnel for a year or so and things will have changed with the Silvertown tunnel opening.
I have seen someone not paying attention at the Rotherhithe tunnel and the roof of their van was a mess (and they're going to pick up a fine probably due to restrictions, the 2 tonnes gross weight limit is lower than a lot of van drivers expect)
I presume the Blackwall one is that unlit LED sign just at the start of the off-ramp. Then there's another set of height detectors on the same post to catch out anyone who's still not paying attention.
I question who approved that the main lanes ahead of your link have 2.8m/9ft limits but the police warning says vehicles over 4m/13ft will be stopped. Can I take my 10ft truck through or not?
I'm starting to feel a tiny bit of sympathy for drivers that get confused by this.
Blackwall seems also to have two sets of lights and barriers, and an off-ramp in between. That's probably for fire safety too to close and evacuate the tunnel and get the emergency services in, but I imagine it's used for height detection too if a loud CLUNK on your truck cabin isn't enough.
As an aside, the person who signed the original heights as (13ft)(4m)(9ft)(2.8m) needs to learn a bit about UI design. Yes, two lanes, but the gap between the central two signs is far smaller than to the other sign for the same lane. Also 4m is just over 13 ft 1 inch, which there'd be space to include as there's already a 0 on the leftmost sign (and from the rightmost we see that decimals are allowed on signs). Guess we're going to rely on the CLUNK after all.
In Germany even this wasn't enough, in a couple of bridges they had to constrain the road leading to the bridge in a way that only small cars would still be able to reach the bridge under repairs.
I also imagine it wasn't cheap doing this, but apparently as long as people can get away with something there is always those that will try, regardless of how it impacts others.
Its an ancient practise, codified into law in 2012 when the regulatory framework was re-codified from multiple laws like Port of London Act 1908 as well as time immemorial acts like this.
As always: there is nothing inherently wrong about either plastics or carbon fuels. The problem is in using it in incorrect situations. Plastics are perfect for transporting an preserving foodstuffs in. Cheeses, meats, etc all have significantly longer shelf-lives because they are placed in plastics in a protective atmosphere. It is things like plastic bottle-caps, plastic straws, and other (generally small) disposable plastic tools that find their way into nature and wreak havoc.
Similarly for carbon fuels: these can have extremely high energy density coefficients, and are usable on a global scale. I would still prefer a move away from them and into Nuclear, but for some situations, having a small canister of fuel and a tool to convert that into mechanical action is extremely useful. Chainsaws for instance.
Also: I don't know what the tolerances for this material are, but they might be interesting for use in space?
If Putin or Xi were installed as President, it’s difficult to see what we’d be doing differently in respect to foreign and economy policy other than our sanctions directly and tariffs directly on them.
"AMD is among several companies contributing to the development of an OpenAI-led rival to Cuda, called Triton, which would let AI developers switch more easily between chip providers. Meta, Microsoft and Intel have also worked on Triton."
This is a bit misleading since Triton is a bit higher level than CUDA. But the idea is kind of right - there’s active development of AMD and Intel backends, and Pytorch is investing into Triton as well.
Just found this FF add-on [1], yesterday, which removes all links from a page. Works reasonably well. Can also invoke reader view after removing links and get the benefits there.
Not irony. The stuff is not on Google, it's on the Internet and directly accessible via links. It's in fact what any company wants, the holy grail: for people to mix its brand with the category of business. It will pass and be replaced by some other fad.
