Much of Brooklyn has only named streets, but Park Slope, Bay Ridge, Sunset Park, Bensonhurst, and Borough Park and the other western sections have numbered streets running approximately northwest to southeast, and numbered avenues going approximately northeast to southwest. East of Dahill Road, lettered avenues (like Avenue M) run east and west, and numbered streets have the prefix "East". South of Avenue O, related numbered streets west of Dahill Road use the "West" designation.