In the US, lane sharing is a special privilege for California riders only, although there have been attempts to pass legislation that would legalize lane splitting in other states—most recently and nearly successfully in Nevada. Lane splitting is legal in much of the rest of the world – it’s considered to be the way of things. Check out what happened in France when the Transport Ministry started talking about citing bikers for filtering.
Click the markers for more information on legislation and laws by state. This page is a work in progress so if you have any info to add on a particular state, please send it in.
View Lane Splitting by State in a larger map
Fortunately for you, the AMA has a state-by-state breakdown of motorcycle laws that’s way better than this cheesy map.