two similar events had occurred and the likelihood was classified as "Remote (C)."Therefore the existing risk was classified as 20 using the matrix, or high risk on the accident investigation, the airport decided to make changes to its airside driving program and introduce an airside driver responsibility and speed enforcement program. The actions are expected to reduce both the likelihood and severities if the vehicle speed is reduced to minimum The assessment with the new mitigation actions classified the credible out- comes as "Major (3)" and the likelihood to "Extremely Remote (D)," taking the risk to the green zone, as illustrated in Figure 14-1.
14.2 General Considerations 14.2.1 Mitigation Strategies when selecting a strategy, personnel should review and assess proposed safety risk mitigation options from the following perspectives Effectiveness: the extent to which the options reduce or eliminate the safety risks. Effective- ness can be determined in terms of reliability to reduce the risk significantly.