From passenger sedans to street sweepers to alternative-fueled units, GF breaks down the average fleet. 1/2-ton pickup trucks are the most common type of units reported, averaging 18 percent of fleet totals. Off-road equipment are the oldest units (9.7 years), and have the longest replacement cycle (13.6 years).

More than 6 percent of units are reported to run on alternative fuels, nearly one-third of which are administrative vehicles. Data shows that not only are most small alt-fuel vehicles older than conventional small fleet vehicles, but their replacement cycles are also longer.

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