PR-18
PR-18 in Pr18 KM 4.2, San Juan Municipio County, Puerto Rico received a condition grade of A (81/100). Built in 2020, the bridge carries 239K vehicles daily on PR-18 over PR-21.
PR-18 carries an A on the BridgeSafety Condition Score with 81/100. Deck, superstructure, and substructure ratings all sit in the better tier of the FHWA NBI distribution. The bridge is structurally sound by federal standards.
The bridge was built in 2020 and is 6 years old — relatively young against the U.S. bridge stock. Modern bridges built to current FHWA standards generally outperform older structures on condition ratings. PR-18 carries an average daily traffic count of 239,000 vehicles, with 2 lane(s) crossing PR-21. The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
Component Ratings
The riding surface, evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
PR-18 is a 6-year-old bridge located Pr18 KM 4.2 in San Juan Municipio County, Puerto Rico. The bridge carries PR-18 over PR-21 with 2 traffic lanes, handling approximately 239K vehicles per day. Built in 2020, the structure spans 69.7 meters.
The bridge received a Condition Grade of A (81/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 8/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
PR-18 has a Condition Score of 81/100 (Grade A). Its deck is rated 7/9, superstructure 8/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
PR-18 was built in 2020, making it 6 years old. The average bridge age in the United States is 48 years.
PR-18 carries approximately 239K vehicles per day (average daily traffic). The bridge has 2 traffic lanes. It is 69.7 meters long and located on PR-18 in Pr18 KM 4.2, San Juan Municipio County, Puerto Rico.
No, PR-18 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
PR-18 is located Pr18 KM 4.2 in San Juan Municipio County, Puerto Rico. The bridge carries PR-18 over PR-21. Its coordinates are 18.389494, -66.072183. It is maintained by State Highway Agency.
PR-18 carries PR-18 over PR-21. The bridge is 69.7 meters long and was built in 2020.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.
Source: FHWA National Bridge Inventory, 2026.