Fig. 5From: Locating helicopter emergency medical service bases to optimise population coverage versus average response timeHybrid solutions showing the optimal base locations to provide the shortest average response time for a, minimum 97.75% coverage and b, minimum 98% coverage. CRRH (E-HEMS) base location in blue. Scenario A represents the optimal trade-off between population coverage and average response time. In scenario B the population coverage increases by only 0.25% whilst the average response time jumps by 30% (8mins)Back to article page