US Bridges

SW 18th Street over I-95 (SR-9)

Good

Palm Beach County, Florida · 0.95 Mi. N of SR-810 · Structure no. 930197

Built
1972
53 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
270 ft
4 main spans
Daily traffic
11,500
2023 count
Owner
State
State Highway Agency

About this bridge

SW 18th Street over I-95 (SR-9) is a prestressed concrete stringer/multi-beam or girder carrying SW 18th Street over I-95 (SR-9) in Palm Beach County, Florida. It was built in 1972, so it is 53 years old, older than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 11,500 vehicles a day, roughly 9% of them trucks, projected to reach 19,952 by 2042. The structure is 270 ft (82.4 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSW 18th Street
CrossesI-95 (SR-9)
Location0.95 Mi. N of SR-810
RouteCity Street 0
StateFlorida
Coordinates26.33194, -80.11722
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.4 US tons
Inventory rating50.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length270 ft (82.4 m)
Longest span100 ft (30.4 m)
Deck width46 ft (14 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,500 (2023)
Projected traffic19,952 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SW 18th Street over I-95 (SR-9) built?

It was built in 1972, making it 53 years old in 2025.

What condition is SW 18th Street over I-95 (SR-9) in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does SW 18th Street over I-95 (SR-9) carry?

About 11,500 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is SW 18th Street over I-95 (SR-9)?

The structure is 270 ft (82.4 m) long with a longest span of 100 ft (30.4 m) and a deck 46 ft wide.

Who owns SW 18th Street over I-95 (SR-9)?

It is owned by the State Highway Agency.