List of highways numbered 688
The following highways are numbered 688:
Canada
- Highway 688, Alberta
- Highway 688, Saskatchewan
China
- China National Highway 688 (Chinese: 688国道, romanized: G688), Xinjiang
United States
- SR 688, Florida
- LA 688, Louisiana
- MD 688 (former), Maryland
- County Route 688 (Burlington County, New Jersey)
- County Route 688 (Camden County, New Jersey)
- County Route 688 (Hudson County, New Jersey)
- County Route 688 (Middlesex County, New Jersey)
- County Route 688 (Passaic County, New Jersey)
- PR-688, Puerto Rico
- FM 688, Texas
See also
- National Cycle Route 688, Yorkshire, England, United Kingdom
| Preceded by 687 |
Lists of highways 688 |
Succeeded by 689 |