Ok...let's let everyone use whatever measuring system they prefer. I kind of like furlongs per fortnight for measuring speed.
You are basically saying that we are not now being told what we must do? I don't like the English system but you are telling me I have no choice but to use it.
Roads in the Midwest are laid out on section lines or half lines. In our world, the centerline to centerline of two parallel roads is 1 mile, 320 rods or 5280 feet apart. If in your world the distance is 1,609.344 meters, great. Use whatever system is easiest for you.
In many ways you do have no choice but to use it. At least when that’s what is being used. Highway markers are in miles, gas pumps are in gallons, fruit and meat is sold by the pound. Of course soda is in liters, automotive tools are almost all metric now, hard liquor is in liters. We have the best of both worlds, we use the measurement system that works best in that situation, even if “best” is only defined by tradition.