Dan Fedderly, executive director of the Wisconsin County Highway Association, put the blame on the state's politicians.

"Until state elected officials are able to agree on a long-term, sustainable transportation funding, Wisconsin will be unable to meet mounting needs on our local roads and state highways," he said in a statement. "The current funding system causes us to be reactive, responding from one crisis to the next."

TRIP analysts estimate a Madison driver spends about $910 a year and a Milwaukee driver spends $944 on vehicle repair and maintenance because of road quality.

"This is yet another report confirming the poor condition of Wisconsin's roads and the impact on motorists. While people may immediately think about the muffler they had to replace, this report shows that safety and congestion concerns make up a considerable portion of the cost of driving on deficient roads," said Craig Thompson, executive director of the Wisconsin Transportation Development Association, which has lobbied for more state road funding.