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Digital highway signage in Sweden

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Revive 755:
So if the power fails there are no signs?  Unless the lane usage changes by time of day or depending upon traffic volumes and the signs are helping with that, this does not seem like a good idea.

Road Hog:

--- Quote from: Revive 755 on July 08, 2023, 10:39:16 PM ---So if the power fails there are no signs?  Unless the lane usage changes by time of day or depending upon traffic volumes and the signs are helping with that, this does not seem like a good idea.

--- End quote ---
I'm sure the vast majority of these signs are solar powered with a battery backup.

kalvado:

--- Quote from: Road Hog on July 08, 2023, 11:00:12 PM ---
--- Quote from: Revive 755 on July 08, 2023, 10:39:16 PM ---So if the power fails there are no signs?  Unless the lane usage changes by time of day or depending upon traffic volumes and the signs are helping with that, this does not seem like a good idea.

--- End quote ---
I'm sure the vast majority of these signs are solar powered with a battery backup.

--- End quote ---
No solar panels to be seen in photos. Besides Sweden is pretty northern .

Road Hog:

--- Quote from: kalvado on July 08, 2023, 11:06:17 PM ---
--- Quote from: Road Hog on July 08, 2023, 11:00:12 PM ---
--- Quote from: Revive 755 on July 08, 2023, 10:39:16 PM ---So if the power fails there are no signs?  Unless the lane usage changes by time of day or depending upon traffic volumes and the signs are helping with that, this does not seem like a good idea.

--- End quote ---
I'm sure the vast majority of these signs are solar powered with a battery backup.

--- End quote ---
No solar panels to be seen in photos. Besides Sweden is pretty northern .

--- End quote ---
Solar panels don't have to be butt-up against the signs. Even Sweden has these uniquely American inventions called "power cables." You ever heard of those? Besides that, as long as there is ambient light and photons flowing freely, solar power can be had. Sweden is mostly south of the Arctic Circle so there will be sunlight available throughout the year. Go back to your Geography class and come correct next time.

Chris:
I think it should be noted that Europe has far less power outages than in the U.S. There is much less severe weather that impacts the power grid.

I assume they have a backup battery. This signage is around a major tunnel and they usually have backup power.

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