Crews started construction Monday along First Avenue, and Monroe and Madison streets.
The $2.2 million project is largely funded through a bond measure voters passed two years ago.
The project manager says when construction is finished, not only will the roads be smoother but the sidewalks will be more accessible and bike lanes wider.
“It’s important that we get in here and we fix them while we can before they deteriorate to the point where we have to spend extra money to do the same amount of work,” said Chuck Mueller, project manager.
Construction’s expected to be finished by early October.