8 bridges with vertical clearance data on SR-18 in Ohio. Lowest: 154.2ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 154.2ft | Sr 18 | Over Sum-Sr 8-1.47 | Jct Of Sr 18 And Sr 8 | 2002 | Map |
| 154.9ft | Sr 18 (Market St.) | Over Kelly Avenue | 1.66 Mi E Of Sr 8 | 2007 | Map |
| 171.6ft | Sr 18 | Ir 75 | Jct Ir 75 & Sr 18 | 2004 | Map |
| 176.8ft | Sr 18 | Sr 59 & Ohio Canal Trail | Jct Of Sr 18 And Sr 59 | 1971 | Map |
| 210.0ft | Sr 18 | Csx Transportation | 1.11 Mi E Of Sr 8 | 1982 | Map |
| 210.0ft | Sr 18 | Csx Transportation | 0.26 Mi E Of Sr 261 | 1939 | Map |
| 231.0ft | Sr 18 | Chessie System Rr | 0.23 Mi. South Of Sr18 | 1967 | Map |
| 243.4ft | Sr 18 | Over Csx Rr | 4.20 Miles East Of Sr83 | 1938 | Map |