All: I just realized I am not clear about the legal status of metric distance and speed limit signs in the USA.
Do Federal laws and regulations permit them in all circumstances? Only some? What role do state, county, and local laws and regulations play in all this? I ask because I'm wondering if turns out to be the case that the UK is the only country on the planet that has officially outlawed metric distance and road signs on officially maintained roadways. Even though such signs are virtually non-existent here in the USA, I'm presuming this is so simply because the states have chosen not to use them rather than because they have been made illegal either at the Federal or the state level. Thanks, Ezra
