A discussion about skewed intersections on Streetsblog's Google Group led to alternate intersection designs, which led me to this very postiive FAQ from the Insurance Institute for Highway Safety about roundabouts: those momentary shifts from cartesian to polar (and back) that people seem to be so afraid of, but actually are safer for everyone—and all at a drastically reduced maintenance cost, too! My favorite is this before-and-after conversion in Asheville. I took a Segway tour that crossed this lovely part of downtown. See it rotarized!