AADTn

AADTn refers to the Annual Average Daily Traffic, adjusted for non-motorized users. It is a metric used in transportation planning and engineering to estimate the total volume of traffic that uses a particular road segment over a 24-hour period, considering both vehicles and pedestrians or cyclists. The "n" suffix specifically denotes the inclusion of non-motorized traffic.

This adjusted metric is particularly valuable in urban environments or areas where active transportation, such as walking and cycling, is significant. By incorporating non-motorized traffic, AADTn provides a more comprehensive understanding of how a roadway is utilized by all users. This data helps in making informed decisions regarding infrastructure design, safety improvements, and the allocation of resources for transportation projects. For instance, a road with a high AADTn might warrant dedicated bicycle lanes or improved pedestrian crossings, even if its vehicular AADT alone might not suggest such a need.

Calculating AADTn typically involves collecting data on vehicular traffic using automated counters or manual counts, and separately collecting data on pedestrian and cyclist volumes. These separate counts are then combined, often with appropriate weighting factors if necessary, to arrive at the final AADTn value. The accuracy of AADTn relies on the quality and representativeness of the traffic count data collected.