CHICAGO -- Anyone who's driven on Illinois' crumbling highways, commuted on regularly delayed Metra trains or sat in traffic on expressways knows the state's transportation system needs an upgrade.

But the candidates for governor have different opinions on how to pay for it.

The Illinois Department of Transportation estimates it will cost billions more annually to maintain and make needed improvements to highways and transit systems.

Republican Gov. Bruce Rauner supports passing a capital bill so the state may issue bonds, though he isn't saying how he'd pay for it. His opponent in the March 20 primary favors cutting spending in other areas.

Democrats seeking the nomination have floated options including a higher gas tax and a so-called "Florida Tax" on people who earn income in Illinois but claim residency elsewhere.