The 'walk/road' radical. Originally a pictograph of a crossroads — 彳 (left half) plus 亍 (right half) — depicting paths leading in opposite directions. Indexes a small set of motion and street characters: 街 (street), 衍 (extend), 衡 (balance), 衢 (thoroughfare). Sandwich-shape: the radical opens left and right while a phonetic sits in the middle.