Originally Posted by RCMoeur

Another example of the "it's not the perfect cycling facility we wish for, so we'll mock it relentlessly to score points with our like-minded in-group."

At least bad humor is better than bad studies, such as the one several years ago that attempted to indict shared lane markings based on zip-code-level crash data.

Shared lane markings are a treatment that can be used if circumstances don't allow for other options and the travel speeds are appropriate. Install them in the wrong place or inappropriately, and results are not likely to be good in terms of utilization.

(long rant on topic of "infrastructure doesn't appear by magic" deleted)

Disclosure: I was chair of the NCUTCD technical committee on bicycle facilities during the time SLMs were added to the MUTCD and bicycle design guides, and was involved in the development of the marking from James Mackay's "bike in a house" in Denver to national adoption in its current form.