The counters consist of two small tube sensors stretching across the street, which are attached to a small metal counting box made by Eco-Counter. The tubes only count people riding bikes. They are very accurate and designed to be used on greenways.
These sensors counts both people riding bikes and pedestrians. Separate volumes are tallied for each travel mode. Wires in a diamond formation in the concrete detect bikes and an infrared sensor mounted on a wooden post detects pedestrians. The counters also capture the direction of travel for both bikes and pedestrians.
This data is derived from sensor stations placed on bridges and surface streets within city limits. Each station has a temperature sensor that measures the temperature of the street surface and a sensor that measures the ambient air temperature at the station each second. Those values are averaged into temperature readings that are recorded by the station every minute. The dataset is updated every fifteen minutes with new data.
SDOT standards include the preservation or planting of trees as an integral part of proposals for improvements in the street right-of-way. Selected, installed and protected to provide optimum functional and environmental benefits, trees are required elements of street right-of-way infrastructure to be maintained and preserved for public benefit.