Actual volumes and estimated volumes are displayed. Estimated volumes are derived from growth factors at permanent counting sites. The growth factors are applied to the most recent actual AAWDT volume at a given location.

Seasonal Adjustments
Volumes are based on counts of one or two day duration (usually completed between May to June and September to October) and are adjusted to reflect an average weekday during the year. Adjustments are based on variations by time of year measured at permanent count locations that monitor traffic year round.

Year to Year Volume Changes ‐ Interpretation of Results
An increase or decrease in volume does not necessarily indicate a trend for a given roadway. Some areas may record a temporary change in volume due to the reconstruction of a roadway link. Although every attempt is made to avoid counting areas while diversions are in effect, some roadway projects affect traffic patterns for a long period of time and are reflected in the counts. For example, the 2011 construction program included Scona Road, the interchange at 23 Avenue/Gateway Boulevard, widening of the Quesnell Bridge, overpasses for major links of the West Anthony Henday, and interchanges for the north Anthony Henday.