I filter past lines of cars all the time. I don't think it's any big deal.
most of my route, though, has no lines of cars as I PREFER a route that does not place me in heavy traffic.
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"Think of bicycles as rideable art that can just about save the world". ~Grant Petersen
Cyclists fare best when they recognize that there are times when acting vehicularly is not the best practice, and are flexible enough to do what is necessary as the situation warrants.--Me