How should the United States undergo metrification?

The United States is one of the few, if not the only, nations in the world that still teaches and widely uses the Customary system of measurements. Whether or not the USA should undergo metrification has been a hotly contested issue both within and outside of the country. Usually, opinions fall within three categories:

• The USA should undergo complete metrification and phase out education and usage of Customary units so that it can be in sync with the rest of the world. Things like "feet" "pounds" and "Fahrenheit" will be relegated as outdated artifacts of language.

• The USA should not be compelled to undergo wide scale metrification because it doesn't need to.

• Both systems should be taught and used simultaneously, but in the right contexts. Metric units are best used in realms where calculated precision is a necessity such as science and engineering whereas Customary can be used in the mundane day-to-day topics such as the weather and cooking.

What do you think is the most reasonable way the USA should go through with adopting, not adopting, or just simply incorporating the metric system? Or is there some other way?

Jam it back in, in the dark.

Consider that the USA is a pretty big country and the only metric nations that could possibly have its people putz around here on a regular basis are Mexicans and Canadians.

In a place like Europe, where the countries are small and the people more mobile, having all roads put to the same standard is exactly how it should be and the fact they went with metric is only one part of that equation, but applying that to the USA, where such a change is not even necessary given that there are only so many connections between the it and other nations, is a logistics nightmare.

"The rest of the world does it" is also not a good reason either.

There's nowhere I can't reach.