Number of Routes Served (PI6504)

This metric is intended to capture the number of routes served by the organization's transportation services. For example, an airline serving 62 direct flights from city to city would report 62 for this metric.

This metric may be most useful for investments in large-scale infrastructure and transportation.

This metric is often used by International Finance Institutions (IFIs) as part of infrastructure analysis.

This metric may help describe the HOW MUCH Scale dimension, which helps estimate the number of the targeted stakeholders experiencing the outcome. For more on the alignment of IRIS metrics to the five dimensions of impact, see IRIS+ and the Five Dimensions of Impact (https://iris.thegiin.org/document/iris-and-the-five-dimensions/). No single metric is sufficient to understand an impact; rather, metrics are selected as a set across all dimensions of impact. The selection of metrics to measure and describe the five dimensions should be based on best practice and evidence.