Fig. 5
From: Introducing fairness in Norwegian air ambulance base location planning
Optimal base locations when adding one or two bases to the existing base structure for a 30 min threshold, 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