Table 2 Interpretation of access indicators during different disaster phases.
From: Characterizing equitable access to grocery stores during disasters using location-based data
Dimensions of access | Access indicator | Normal period | Preparation | Impact/Short-term recovery |
|---|---|---|---|---|
Redundancy | Number of POIs | More visited stores means more options to satisfy life needs. | Increased redundancy means more visits compared to baseline due to higher preparation levels. | Increased redundancy compared to baseline means greater recovery activity. |
Rapidity | Duration (sec) | Greater duration means a lower rapidity and longer commutes to grocery stores due to longer distance or traffic congestion. | Reduced rapidity means a greater duration compared to baseline due to more time spent obtaining supplies as a result of longer commutes and traffic congestion. | A lower rapidity (greater duration) compared to baseline means greater impact to access (due to store and/or road inundation). |
Proximity | Distance (mile) | Greater distance means a lower proximity and thus greater distance from stores. | Closer proximity means greater distance compared to baseline, which means greater effort for obtaining supplies. | A lower proximity (greater distance) compared to baseline means greater impact to access (due to store and/or road inundation). |
