OR UHU Unit Hour 
High Performance EMS
MARCH 18, 2021
Then, although the absolute distance from the incident scene to the closest facility is fixed, the best route is not always the same during each hour-of-the-day or day-of-the-week given traffic, weather, or other active incidents. EMS agencies typically target a UHU of between 0.30
High Performance EMS
DECEMBER 27, 2023
Even shorter temporal variation On a shorter scale of time, differences are also recognizable by day of the week or even hour of the day. The early morning hours of these business days also exhibit patterns found with early waking habits and the increased vehicle traffic and population movement.
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