Auxiliary power units (often referred to as APUs) reduce the need for trucks to run their engines on idle while they’re parked, and are normally used by truck drivers to monitor their use of fuel. One negative of these units is they typically weigh a couple hundred pounds, and could be a problem for drivers who carry maximum weight limits. With the president’s latest expansion of the MAP-21 bill dealing with state-by-state APU regulations, this may be confusing to drivers who often cross state lines.

Below we’ve placed a chart, created by fleet management software company Track Your Truck that notifies drivers exactly how much APU weight that is exempt in whatever state they’re in.

Check it out:

APU Exemption Guide

APU Exemption Guide credited to Track Your Truck

APU Weight Exemption Guide
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