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I don't think it would be that big a deal for the US to switch over under a hybrid system like ours. I think most people already know about it. The big expense would be replacing all the road signs. Hey, at least it would create jobs.
The funny thing is, governments here don't often seem to give a damn about doing things efficiently, or avoiding wasting money.
"Spend more on tougher roads so that we don't have to resurface them annually, which would save money in the long run? But what about the loss of jobs that would result? We can't have that!"
There are a few states that use the state's outline on road signs, instead of a more standard route symbol for things like interstates or numbered routes. I wonder how much that cost each state to make the change to their signage once that was done?
And I wonder how much benefit that's brought the taxpayers who fronted that expense?
😀
So I think that any reason for a big sign changing operation would seem to be no issue as far as state and local governments are concerned. If anything, they could use it as an excuse to shoehorn in some kind of pointless "branding" for their state or municipality. Or hell, sponsorships. "Welcome to McDonalds' Route 37!"
And we've already got metric creeping in a few places.
- Lightbulbs are sold by the watt, not horsepower.
- Electricity is billed in watt-hours, not horsepower-hours. (Kilowatt-hours, if you want to include the multiplier.)
- Light output is expressed in lumens, which incorporates the SI candela unit, not the English
candlepower unit, though the candela's definition is approximately equal to 1 candlepower.
- Drugs and medications are often sold in milligrams.
- Soda can be bought in 1L and 2L sizes.
- Engine displacement is commonly expressed in liters or cubic centimeters.
- LCD monitors express their brightness in candelas per square meter.