10 bridges with vertical clearance data on SR-18 in Arkansas. Lowest: 142.7ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 142.7ft | Sh 18-07- Lm 0.67 | Broadway St.; Bnsf Rr | 0.80 East Of Hwy 61 | 2015 | Map |
| 160.8ft | Sh 18-07- Lm 2.57 | I 55-Sec 12 | Blytheville | 1960 | Map |
| 168.6ft | Sh18 Sec 4 Spur | I-555-Sec 7-Lm 4.27 | .3 Mi Ne Sh 463 | 1986 | Map |
| 170.3ft | Sh 18/Jackson Co. | Us 67 - Sec 15 | Jct. Hwy 18 & Us 67 | 2006 | Map |
| 238.8ft | Ar 18-04 Lm 4.04 | Bnsf Rr/E Nettleton | 0.90 E Jct Of Us 49 | 2022 | Map |
| 989.8ft | Sh 18-04-Lm 9.81 | Maple Slough | 4 Mi. W Jct. Sh 158 | 2003 | Map |
| 989.8ft | Sh 18-04- Lm 14.84 | Purcell Slough | .20 Mi E Jct S H 135 | 2007 | Map |
| 989.8ft | Sh 18-04- Lm 27.68 | Ditch No. 5 | 2.2 Mi E Jct Sh 139 & 18 | 2016 | Map |
| 3277.6ft | Sh 18 Lm 24.09 | Ditch | 1.2M W Of Monette | 2017 | Map |
| 3277.6ft | Sh18 Sec4 Lm25.99 | Little Ditch No.3 | 0.5 M East Of Jct 139. | 2017 | Map |