[harambae]

> In the US that is illegal almost everywhere

But, for anyone else reading, one of the few places filtering and lane splitting in general is legal (up to ~10mph speed difference) is in California.

There was extensive discussion on a recent episode of "Highside Lowside" (Revzilla's Podcast) about whether lane splitting at speed increases or decreases safety, complete with stats and personal experiences. (In their opinion it comes down to the skill of the rider.) Filtering when cars are fully stopped is likely safe and less contentious.