9 bridges with vertical clearance data on SR-31 in New Jersey. Lowest: 78.4ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 78.4ft | Rt. 31 | Wildlife Underpass | 0.11 Mi S Of Cr 618 | 1998 | Map |
| 154.2ft | Nj 31 Nb | 78 & Rmp[31 Sb To 78 Eb] | I-78 & 31 Nb Junction | 1967 | Map |
| 158.1ft | Nj 31 Sb | I-78 | At Nj 31 Interchange | 1967 | Map |
| 163.4ft | Nj 31(Penn.Rd) | I-295 | At I-295 Exit 72 | 1974 | Map |
| 231.6ft | Nj Rt 31 | Lehigh Valley Main Line | 1.95 Mi N. Of Co Rt 523 | 2003 | Map |
| 235.9ft | Nj 31 | Trenton Line (Csx Rr) | 1.0 Mi North Of Cr 546 | 2018 | Map |
| 246.7ft | Nj 31 | Raritan Valley Line | 0.3 Mi N Of Main Street | 2013 | Map |
| 999.0ft | Nj 31 Nb | Beaver Brook | North Of 31/78 Jcn | 1966 | Map |
| 999.0ft | Nj 31 | Stony Brook | 4.2 Mi S Of 31-202 Jct | 1929 | Map |