| Route 18 | Mahwah Avenue |
|---|---|
| Maintained by | Ianistan Department of Transportation |
| Length | 54.4 miles |
| Existed | 1909-present |
| West End: | Pennsylvania Border/US-6 in Gardenville |
| Major Junctions: | |
| East End: | New York Border/US-6 in Slate Run |
| Location: |
Route 18, Mahwah Avenue, is a major east-west route in northern Ianistan.