Several layers were examined as part of the highway improvement needs analysis conducted for the 2017 State Transportation plan. Bridge needs on the Primary Highway System were evaluated based on the bridge condition index. Bridges falling within the lowest-rated 5 percent of the system were targeted as having bridge condition needs. For more information, see iowadot.gov/iowainmotion. Deprecated March 7, 2023. Replaced by other Scoping data services.
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