3 ms·
I always figured it was to give drivers something to do to keep them awake.
by InCityDreams 4y ago
I always figured it was to give drivers something to do to keep them awake.
- drewzero1 4y agoI had heard of that idea in relation to the design of the US interstate highway system. I looked into it[0] and found that it may be a consideration, but not a requirement as I thought I remembered. https://www.fhwa.dot.gov/interstate/faq.cfm#question31a https://www.fhwa.dot.gov/interstate/faq.cfm#question31a