[B’ Spokes: My argument goes something like this: It is totally illogical to put design elements from freeways where bicyclists and pedestrians are prohibited into urban settings where bicyclists and pedestrians are allowed. Charles Marohn argument has many more points then just bike/ped safety. He also makes an argument for separate designs rather then trying to mix the two, better roads that can accommodate fast travel for cars as well as streets that accommodate everyone equally (or even more so for bikes and peds.) Because when you mix the two, everyone loses.]
By Charles Marohn, Strong Towns
If we want to build places that are financially productive, we need to identify and eliminate STROADs. A STROAD is a street/road hybrid and, besides being a very dangerous environment (yes, it is ridiculously dangerous to mix high speed highway geometric design with pedestrians, bikers and turning traffic), they are enormously expensive to build and, ultimately, financially unproductive.
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https://www.strongtowns.org/journal/2013/3/4/the-stroad.html