The San Juan Bridge No. 3 is the northbound portion of the whole San Juan Bridge. It was constructed after completion of bridge no. 2. During its construction, traffic was diverted over bridges no. 1 and no. 2. The same as bridge no. 2, bridge no. 3 was constructed by demolishing the old northbound bridge and the new bridge was constructed. After construction, all three bridges were connected by pouring the closure gaps with one-day concrete.