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​Monthly Variation Reports
Annual Comparisons by Functional Classification

The figures contained in this report compare the average daily traffic volumes for each month by functional class of highway. The percent change is the change in traffic volume for each month over the time period.

Percent change = Vol (current year) β€” Vol (previous year) X 100
                                                 Vol (previous year)

Where Vol = average daily traffic volume for the month

The total system average column shows a simple average across all functional classes

The annual percentage change shown at the bottom of a report is a simple average of the 12-month period



Dave Gardner
Traffic Monitoring
(614) 752-5740


 Monthly Variation Files


​The current year files are updated on a monthly basis and reflect the changes for the year to date.


 The Reports