I've been fortunate so far when splitting. I usually only do it at red lights though, and sometimes feel like people are giving me hate looks through their windows. I-80 still scares me, even though I've ridden on it here and there for a year now - just too much traffic, such different speeds, and people tailgate like mad. Sometimes I'll get so frustrated with someone following me at about five feet that I'll motion with my hand for them to move back. Assholes never do though.