Here, in the U.S., we're one of just a few countries that are still using the Imperial measurement system, one that isn't exactly consistent across borders. That we're not all-in on the metric system here in 2021 is silly. We even have muppets like Tucker Carlson who attribute the Metric system to some "creepy new world order." Congress passed a law in 1975 to get this country over to the Metric system. The problem is, however, that it's voluntary. While there is a regulation in place to require agencies to use the Metric system, it lacks teeth. So, why can't we just switch to an objectively easier system?

We're Already Using Metric Measurements

While many Americans hold on to the system they've always used out of fear of what's different, much like how they resist something as simple as wearing a mask to protect others from COVID-19, they're already using the Metric system in their day-to-day life.
Those guys boasting about "resisting the mask Nazis" as they stand by their over-sized grocery-getting pickup trucks compare engines using Liters (Metric!). In among their groceries are packages that have Imperial and Metric measurements side-by-side. Even more explicitly, they bought 2-Liter bottles of fizzy sugar water (soda). When they get home, after drinking their fizzy sugar water, they take their diabetes medication measured out, you guessed it, with the Metric system. Anyone (not those guys) who's participated in Track events in high school or college used the metric system. Those running events are measured in Meters. Casual runners and walkers doing 5Ks? Kilometers. Scientists in the U.S.? They're using the Metric system.

Finishing the Conversion Would Be Easier Than You Think

Take a look at the image to the right. It has two roughly equivalent speed limit signs, one in MPH and the other in kph. The second one doesn't even need the "km/h" under the number. The red circle is an international standard indicating a restriction. Adding the Metric speed limit sign should be done immediately. It allows people whose cars are showing Imperial measurements to understand how fast they're going relative to the speed limit while the conversion moves forward. At the same time, new cars should be sold displaying vehicle speed in kph by default and as the most prominent vs any side-by-side mph display. People driving older vehicles would use the upper speed limit sign while those driving newer vehicles would use the lower. The diferently-designed signs have the added benefit of avoiding confusion. Do I drive 40 mph or 60 mph? Highway signs showing distances should also be modified to show both miles and kilometers. While we're at it, stop teaching the Imperial system in grade school. Full stop.

Five years later: remove all Imperial measurements from new vehicles. Metric only.

Ten years on: remove all Imperial measurements from road signs.

How easy would it be for Americans to mentally make the switch? It would be easier than you think. When I was in France, we got around by car. Driving and obeying the speed limit was not difficult. The signs said the speed limit was 110 kph. The car showed the speed in kph. Anyone who can't do the same needs their license revoked.