The bridge was shut down for emergency repairs on Thursday.
A Thursday morning inspection indicated that the steel connection in the floor beams near the south end of the bridge had deteriorated.
The road is now re-open because a temporary repair "carrier" beam was installed in the northbound shoulder, which remains closed.
The bridge is located on the border separating Onondaga and Oswego counties.
The DOT says a more permanent repair will be made in the near future.
Vehicles over the 20 ton limit must use an alternate route, such as Bartel Road, I-81, and State Route 49.
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