@n18 210829 wrote:
The latest MUTCD edition(which the OP cited) is from 2009 with revisions from 2012, so it’s 9 Years old at least. I don’t know if LPI existed back then, or at least the push for road cyclists to use it.
Well, FWIW the City webpage baiskeli cited in 2019 said of general pedestrian LPI that “Localities across the country and around the world (including Alexandria) have been implementing this solution for decades”.