Found this no turn relation with a way with a way as 'via':

https://www.openstreetmap.org/relation/6187972#map=19/37.77332/-122.42359

OSRM seems to ignore the restriction and route through it anyway.

http://map.project-osrm.org/?z=18&center=37.773111%2C-122.423857&loc=37.773263%2C-122.423996&loc=37.773280%2C-122.423792&hl=en&alt=0

According to the OSM Wiki this looks like a valid restriction.

cc @Andygol