Infrastructure :
County State-Aid Highways, 2008

County State-Aid Highways (CSAH) are supported by state dollars but are maintained by county departments of transportation. The amount of state funds per county is based on a formula that includes several variables. Some of the key variables are the number of CSAH lane miles and vehicle registrations per county, along with other factors. Sixty percent of the apportionment is used for construction and forty percent for maintenance. Depicting lane miles of road rather than simple miles of road reflects the greater concentration of lane miles in the more populous counties, where four- and six-lane highways are more common. Lane miles also reflect the differences in the construction and maintenance needs in each county.

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