Filtering Traffic Flow Data
You can use the
flow resource to request traffic flow data containing speed and congestion ("jam factor") information for a geospatial area. The response data format is either XML or JSON. Optionally, your request can specify shape and functional class information to further identify the roadways for which you wish to obtain traffic flow information.
The service supports the following geospatial filters (addressing schemes):
- bounding box (
- proximity (
For more information about these filters, see Selecting a Request Pattern.
RW) that fall within the geospatial address.
By default, a response contains all the available flow information for the specified spatial filter. It is, however, possible to add a further filter based on the functional class of the road through the parameter
maxfunctionalclass, and a filter for minimum and maximum jam factor values through the parameters