Ōsaka 42 map courtesy of Google Earth
| Length |
| 8.5 km + 2 km no-vehicle section (using Wikipedia's description, see Notes below) |
| Route name |
| Sumiyoshi Yao line (see Notes below) |
| Western terminus |
| Ōsaka-shi Suminoe-Ku, near Shin-Kizugawa O-hashi |
| Eastern terminus |
| Ōsaka-shi Higashisumiyoshi-Ku Yada 6-chome, route 26 No-vehicle section: Ōsaka-shi Hirano-ku, route 179, near Takano O-hashi |
| Municipalities traversed (W to E) |
 Suminoe-ku  Sumiyoshi-ku  Higashisumiyoshi-ku  Matsubara-shi (no-vehicle section only)  Hirano-ku (no-vehicle section only) |
| Points of interest |
| World's only no-vehicle section Highway 42! (so far) |
Road intersections |
| route 29 (1.9 km duplex) Route 26 route 30 route 28 route 26 route 179 (no-vehicle section only) |
| Train line intersections |
| Yotsubashi subway line (near Kitakagaya Station [Y20], Suminoekoen Station [Y21]/[P18]) Nankai Main line (near Suminoe Station) Hankai line (under Abikomichi Station) Nankai Koya line (near Abikomae Station) JR Hanwa line (near Abikocho Station) Midosuji subway line (near Abiko Station [M27]) JR cargo line (defunct) No-vehicle section: Minami Ōsaka line (near Yata Station) |
| Notes |
Ōsaka 42 is the part of the Sumiyoshi Yao line (commissioned 1 December 1959) designated as a Principal Local Road (Shuyochihodo). The rest of the route is designated as route 179, a General Prefectural Road (Ippanfudo). Maps are obscure as to which parts are 42 or 179 (there are many discrepancies, even among the same maps), and signage appears to be only at the route 30 and route 28 intersections. Wikipedia indicates that the Principal Local Road designation ends near the Takano O-hashi, so that is the route I will assume 42 to be. The route number was previously assigned to the current route 63 (Izumi Sano Iwade line). |