Fatal Car Accidents at Intersections in Florida Heatmap

Heat Map of Fatal Accidents in Florida Reported by FARS
Florida Fatal Car Accidents Heatmap

Every year Florida leads the Nation with the most fatal car accidents at intersections.  Why is this?  Is it because of the older people driving and shouldn't be?  I would be curious if any studies have been done to analyze this fact.  Please post study links in the comments section.  This data was pulled from the FARS (Fatal Accident Reporting System).