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Auxiliary power units are used by a large number of truck drivers to help limit fuel use.  Because the units eliminate the need to run trucks engines on idle while parked, they save drivers money in fuel costs and vehicle “wear and tear”.

Given that most units weigh several hundred pounds, the added weight can become problematic for drivers who consistently carry loads weighing in at the top of their GVW limits.  With the president’s recent expansion of the MAP-21 bill which deals with state-by-state APU regulations, weight restrictions have become a bit muddled.

Below we’ve placed a guide put together by vehicle tracking company Track Your Truck that can help drivers clarify how much weight is exempt state by state.

Check it out:

APU Exemption Guide

APU Exemption Guide by Track Your Truck