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The index, for a generic macro- criterion m is defined by: Open image in new window.
A composite index for crossing safety and indexes for each macro-criterion have been developed.
Open image in new window is the weight of general criterion A j associated to general macro-criterion C m ; w m is the weight of general macro-criterion C m contributing to the general goal.
The weight Open image in new window of general criterion Aj associated to general macro-criterion Cm; The weight wm of general macro-criterion Cm contributing to the general goal (safety level).
Where: Open image in new window is the weight of general criterion A j associated to general macro-criterion C m ; w m is the weight of general macro-criterion C m contributing to the general goal.
An analysis of changes of the ranking by removing a macro-criterion one by one was performed.
Each macro-criterion consists of 2 3 mid-criteria, which are explained by some more specific micro-criteria.
Additional indexes have been developed to evaluate safety of a pedestrian crossing in relation to a single macro-criterion.
A group of 15 crossing was evaluated and the rankings considering Safety index and Macro-criterion indexes were elaborated.
A high number of changes is produced also by removing "Spatial and temporal design" macro-criterion, but the entity of modification to the ranking is less deep.
Even if "Night-time Visibility" received the main contribution to crossing safety level, "Accessibility" seems to be the macro-criterion that causes a deeper modification of the ranking.
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