Pr 20 over Pr 21

San Juan Municipio, Puerto Rico · rated Good in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Pr 20 over Pr 21 in San Juan Municipio, Puerto Rico, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1997, making it 28 years old at the 2025 inventory.
It carries about 38,400 vehicles a day (traffic count year 2017).
It is one of 42 of the 201 inventoried bridges in San Juan Municipio rated good (20.9%); 21 (10.4%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Prestressed concrete stringer or multi-beam girder
Length	about 94 ft
Location	2.3 Km North of Guaynabo
NBI structure number	023771
Condition class	Good

Source: FHWA National Bridge Inventory, 2025 data as reported by the Puerto Rico department of transportation.

Bridge	Built	Vehicles/day	Condition
Pr 18 3.35 Km over Ave. Amer Miranda 1.4 Km	1967	261,400	Poor
Pr 18 2.1 Km over Piedras River	1967	261,000	Fair
Ramp PR18 0.02 Km over Pr 18 NB Pr 22 WB Km 2	2007	239,000	Fair
Rmp 18 SB 21 WB over Ramp Pr-21 Centro Medico	2018	239,000	Good
Pr-18 over Pr-21	2020	239,000	Good
Pr 22 0.7 Km over Pr 35 2.4 Km	1976	201,100	Fair