Skip to main content
. Author manuscript; available in PMC: 2017 Sep 1.
Published in final edited form as: Environ Int. 2016 Jul 1;94:635–641. doi: 10.1016/j.envint.2016.06.031

Table 1.

Description of primary traffic metrics of interest

Traffic metric Measurement Description
Distance to nearest major road/highway Meters Distance to nearest major road or highway (does not include local roads).
Max annual average daily traffic (AADT) - traffic volume Vehicles/day Daily maximum traffic volume within 150 m buffer.
Closest AADT - traffic volume Vehicles/day Traffic volume of closest major road or highway within 150 m buffer.
Distance-weighted traffic density (DWTD) Vehicles/day Road segment with highest AADT within 150 m buffer, with application of Gaussian weight based on distance from residence.
Traffic density Vehicle-km/hr Sum of all length-adjusted traffic volumes within 150 m buffer.