Fig. 2
From: Introducing fairness in Norwegian air ambulance base location planning
The optimal 8 base locations for a time threshold of 45 min using different objective functions. Utility is defined as the probability that a HEMS departing from the nearest base reaches the patient on time; green means an inhabitant may expect HEMS to always be on time; yellow means inhabitants should expect on-time arrival in 50% of the cases, and red 0% of cases