The ArcGIS system does not place any constraint on route measures. Route measures can always increase or decrease with respect to a route's digitized direction or be some combination of increasing and decreasing values. In addition, route measures may be unknown (NaN).
Route measure anomalies are portions of routes where the measures do not conform to the standards your application expects. With the ability to display what you deem to be route measure anomalies in ArcMap, you can ensure that the measures on your routes conform to the needs of your application. Seeing where route measure anomalies occur can help you isolate routes that may need to have their measures edited.
- Right-click the route layer in the table of contents and click Properties.
- Click the Routes tab.
- Click the route measure anomalies you want to display and change the symbology as necessary.