I was just thinking, why don't they install a steel beam at the same height as the maximum allowed, like 11foot8?
Obviously it would be set much farther back than theirs.
because it might get knocked off into neighboring traffic.
Seems like a simple solution. Split the beam in the middle with hinges on left and right. Allow left and right beams to travel a bit but not too far.
It's interesting comparing this to the airline safety issues in the news lately. Every single thing on an airplane is designed with safety in mind but for road traffic, they just put up a stop sign and call it a day. These aren't directly comparable issues but it does seem like they don't really think about safety in the same way at all when designing roads. Why are trucks that can't fit into the tunnel even physically allowed to make it that far?
Seems like the liability for damages caused needs to be replicated between the drivers and their hiring company, making it not worth ignoring signage like this
Not everything can be solved with economic incentives. Do you really think people are making a conscious decision, "I'm not paying for it, might as well peel the top off my truck and grind my day/week to a halt because my employer is liable for damages"? If that was the case, they can just drive through the water wall too. This is an attention management issue -- does the driver realize they are too tall for the tunnel. Most will be caught with the initial flashing signs, but even those high-salience signs are somewhat 'normal' and thus possible to subconsciously ignore. The water wall is very out of the ordinary so it has a maximum likelihood of capturing attention.
Seems quite complicated.
Pretty sure Musk's self driving system would have no problem with this. :)