I'm doing a short paper for history class on the effects of the Interstate
Highway System on the United States. One thing I noticed when researching
was that many states now number exits by the mile. My question is, when the
inevitable metric switch happens, will they renumber the exits? I know a
lot of nations that have been metric for a while have distance markers every
100m and exits every 1km if possible.
Renumbering the exits seems like quite an extensive task. It makes me wonder
if the US should just signpost every 100m and then replace the sign saying
"exit 310 next 1 mile" with one saying "exit next 1.6km or 1600m"
Thoughts?
Mike
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