I see that some vocations in my O/D analysis are considered “Long Distance”, but all my journeys took place in the same county - how can this be?

Vocations are assigned based on observing a vehicle's movement patterns for at least 3 months. If their driving behaviors have changed, it will take some time for the vocation models to pick up on this and re-assign them. This could also occur if the trip chaining value used is not enough to string the trips together to show a pattern more indicative of long distance driving.