OS (GB) ITN

Finds a route over the road network in an OS (GB) ITN Dataset, using average speeds for each road classification.

Select Analysis > Routing > Point-to-point.

Select OS (GB) ITN

The following CASE expression is used for OS (GB) ITN:

(_length# /
  CASE
    WHEN DescriptiveTerms$='Motorway' THEN 60
    WHEN DescriptiveTerms$='A Road' THEN 50
    WHEN DescriptiveTerms$='B Road' THEN 25
    WHEN DescriptiveTerms$='Minor Road' THEN 20
    WHEN DescriptiveTerms$='Local Street' THEN 20
    ELSE 0
  END)
* (60 / 1609.344)

The example below shows the route between the two blue ringed points:

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