Proposition 109 would direct the Colorado Department of Transportation to issue $3.5 billion in bonds for more than 60 road work projects across the state. 

The measure differs from Proposition 110 in that it would not raise taxes or fees, and does not include any money for public transit. It also forces the legislature to spend more on highway projects at the expense of other state programs.

Page three of this document shows exactly which projects would be funded under the measure.

Proponents, including the conservative Independence Institute think-tank, argue the state's aging highways contribute to traffic congestion and reduce safety. Opponents say the measure fails to address ongoing maintenance costs and spends too much on debt servicing (the state would end up paying $5.2 billion for the $3.5 billion it would borrow). 

The measure is statutory, meaning it needs a simple majority to pass.