Johnston County Bridge Report Card
Johnston County scores 90 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Johnston County, North Carolina
Johnston County has 322 bridges in the National Bridge Inventory, with 12 rated poor and 0 rated scour-critical. Its poor-condition share of 3.7% is at or below the 7.1% statewide average. Poor-condition bridges carry about 99,100 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Johnston County a Bridge Condition Exposure Score of 90/100 (A). The county has 322 bridges in the National Bridge Inventory, including 12 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 99,100 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.
How the Score Breaks Down
| Factor | Weight | County Value | Penalty |
|---|---|---|---|
| Poor-condition bridge share | 40 | 3.7% | 7.5 |
| Poor-condition traffic exposure | 25 | 4.0% of measured traffic | 3.0 |
| Scour-critical bridge share | 20 | 0.0% | 0.0 |
| Average age vs national baseline | 10 | 36 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 2,477,087 measured daily crossings | 0.0 |
Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.
County Comparisons
| County Poor-Condition Share | 3.7% |
| State Poor-Condition Share | 7.1% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.0% |
| Average Bridge Age | 36 years |
| Poor-Condition Traffic Exposure | 99,100 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Johnston County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Nc42 over Swift Creek | Poor condition + traffic exposure | Poor | 21,000 | 1947 |
| I95 Sbl over Black Creek | Poor condition + traffic exposure | Poor | 21,000 | 1955 |
| Nc42 over White Oak Creek | Poor condition + traffic exposure | Poor | 20,000 | 1947 |
| Sr1700 over Neuse River | Poor condition + traffic exposure | Poor | 11,000 | 1981 |
| Us70bus over I95 | Poor condition + traffic exposure | Poor | 10,500 | 1955 |
| Sr1003 over Buffalo Creek | Poor condition + traffic exposure | Poor | 4,800 | 1977 |
| Sr1007 over I95 | Poor condition + traffic exposure | Poor | 2,600 | 1955 |
| Sr1007 over Polecat Branch | Poor condition + traffic exposure | Poor | 2,400 | 1999 |
| Sr1928 over Br. Of Neuse River | Poor condition + traffic exposure | Poor | 2,200 | 1980 |
| Sr2130 over I95 | Poor condition + traffic exposure | Poor | 1,800 | 1956 |
Important safety note
Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.