Driver Guides | CDLMath

These guides cover the questions that come up around CDLMath's calculators. They are grouped by the job at hand and link back to the relevant tool.

Tandems and axle weights

A direct way to choose the direction of a trailer-tandem move from the heavy axle group.

Why pounds per hole varies and how two scale tickets give a better number for the current load.

Use steer, drive, trailer, and gross readings to decide what kind of weight problem you have.

A decision process for determining whether a tandem slide can actually correct the ticket.

Estimate the trip, compare it with every remaining clock, and identify the tightest margin.

Understand why each HOS limit can independently stop a property-carrying driver from driving.

Understand paid miles, mileage rates, accessorial compensation, and useful effective-pay comparisons.

Estimate driving and idle fuel from distance, MPG, diesel price, and the conditions expected on the trip.