The Ingham County Road Commission says the Hagadorn Road bridge over the Red Cedar River is open to one lane in both directions.
The project is not complete yet, but traffic can now move in both directions. Lanes are not painted yet. The painting should be done by the Wednesday afternoon.
The expansion project has widened the bridge from four lanes to six lanes.
Work started the first week of March of this year. It's estimated cost is $2.214 million.