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A half billion dollars... or 500 million to raise the roads and sea walls. And this is just for the roads and sea walls and doesn't cover the many multiples of billions that home and commercial landowners are going to have to pay to protect their properties from sea level rise.
My very rough and estimated count came up with about 40 sets of traffic lights.
The roads are being raised 2 feet.
What difference does it make? Raising things two feet will help until sea levels go up 2 feet. Or do you just want to come up with a time frame that will allow you to divide the cost up over several years? Sorry Tim, but the costs of raising the roads for this island can't just be spread out over time. The costs are happening now.
I would never trust you to fairly compare costs on something like this. I have dealt with your inability to analyze numbers for this kind of thing many times... and they are a joke.
So... let's just look at the numbers now.
You came up with an article about Miami-Dade spending 11 million to upgrade 300(10%) sets of lights to "smart lights". That is about 36,000 per set. So, if my count is correct, Miami Beach could upgrade all their lights for about a million and a half. A hell of a lot less than a half billion.
I also came up with a source that gave costs for installing a new set of lights that was from 250.000 to 500,000. And that includes installation of power lines. So... even if Miami Beach needed to replace ALL of their traffic lights including the poles and wiring they could do it for about a max of 20 million. Still significantly less than this partial costs of mitigating sea level rise.
Send your $100 here.
Yes the cost of doing this work will need to be spread over the next 100 years because that is the time frame for sea levels to rise by 2 feet.
So 500 million, is 5 million per year.
Miami beach is full of intersections like this one;
Google Maps
This is a far more complex set than you would get for $500,000. More like $1,000,000. Shockingly expensive things traffic lights. They have a half life of say about 20 years and I make it more like 60 sets. With maintenance at 5% per year, a very conservative estimate, you have found the place which almost makes it.
Then again it is a Beach. If you are going to build on a beach well,..........