Idaho ranks 16th in the nation in highway performance and cost-effectiveness in the Annual Highway Report by Reason Foundation.

Idaho ranks 37th in fatality rate, 17th in deficient bridges, 36th in rural Interstate pavement condition, 28th in urban Interstate pavement condition, and 12th in urbanized area congestion.

On spending, Idaho ranks 16th in total disbursements per mile and 15th in administrative disbursements per mile.

Idaho’s best rankings are urbanized area congestion (12th), rural arterial lane-width (13th), and administrative disbursements per mile (15th).

Idaho’s worst rankings are fatality rate (37th) and rural Interstate pavement condition (36th).

Idaho’s state-controlled highway mileage makes it the 43rd largest system.

Idaho’s Complete Results Ranking
Overall Rank in 2013: 16
Overall Rank in 2012: 30
Overall Rank in 2011: 8
Performance by Category in 2013 Ranking
Total Disbursement per Mile 16
Capital-Bridge Disbursements per Mile 22
Maintenance Disbursements per Mile 24
Administrative Disbursements per Mile 15
Rural Interstate Percent Poor Condition 36
Rural Other Principal Arterial Percent Poor Condition 32
Rural Other Principal Arterial Percent Narrow Lanes 13
Urban Interstate Percent Poor Condition 28
Urbanized Area Congestion, Annual Delay Per Auto Commuter 12
Bridges Percent Deficient 17
Fatality Rate per 100 Million Vehicle-Miles of Travel 37

The Annual Highway Report is based on spending and performance data submitted by state highway agencies to the federal government for 2013. For more details on the calculation of each of the 11 performance measures used in the report, as well as the overall performance measure, please refer to the appendix in the main report. The report’s dataset includes Interstate, federal and state roads but not county or local roads. All rankings are based on performance measures that are ratios rather than absolute values: the financial measures are disbursements per mile, the fatality rate is fatalities per 100 million vehicle-miles of travel, the urban congestion measure is the annual delay per auto commuter, and the others are percentages. For example, the state ranking 1st in deficient bridges has the smallest percentage of deficient bridges, not the smallest number of deficient bridges.

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