The National Transportation Research Group, or TRIP, says despite increasing fuel taxes and registration fees in Michigan, it's still not enough to fix all the roads in the state.

TRIP Director of Policy and Research Rocky Moretti says although many road projects can be completed under the current $1.2 billion plan, some $200 million dollars more would be needed to address what he calls one of the largest pavement challenges in the nation.

The Michigan Department of Transportation says 20 percent of the most critical roadways in the state are in poor condition.