The Illinois Department of Transportation earlier this month placed weight limits on the Jackson Street drawbridge downtown.
The restriction was put on the bridge due to deterioration of structural steel that supports the bridge deck, IDOT spokesman Guy Tridgell said.
Tridgell said the weight limit was imposed after recent bridge inspections found deterioration in some of the floor beams and stringer ends.
IDOT has included Jackson Street bridge repairs, which would fix the problem, in its five-year maintenance plan extending to 2024, Tridgell said.
However, the project, estimated to cost $3.45 million, has not been funded. A date has not been set for the work.
The new weight limits are 23 tons for a single-unit truck and 41 tons for combination vehicles. The weight limits have been posted at the bridge.
According to IDOT, 8,000 vehicles a day use the Jackson Street bridge and 2 percent of those are trucks.
The Jackson Street bridge is one of five drawbridges in downtown Joliet that IDOT oversees.