Challenge is: full conversion of all of the US highway signs and mile markers to the metric system by 1990. Store weights and prices may remain in lbs. Football will remain in yards. Just the highway system. What I'm aiming for is the situation that Canada has now: metric highway signage and metric roadway construction; customary measurements for popular commerce and informal use.
When would conversion have to begin? How much would it cost? Would individual states bear the burden of signage updating, or would the Federal government contribute to the updating? Would the American people strongly resist metrication (as they did OTL with the 1975 Metric Act)?
One of the reasons the 1975 Act failed was because Congress made conversion "optional" and delegated all responsibility to the states. I suggest that the US Federal government would have to exercise a substantial degree of oversight in order for metric roadways to take place.
When would conversion have to begin? How much would it cost? Would individual states bear the burden of signage updating, or would the Federal government contribute to the updating? Would the American people strongly resist metrication (as they did OTL with the 1975 Metric Act)?
One of the reasons the 1975 Act failed was because Congress made conversion "optional" and delegated all responsibility to the states. I suggest that the US Federal government would have to exercise a substantial degree of oversight in order for metric roadways to take place.