A vehicle weight determination apparatus is disclosed which includes a receiver; a persistent memory storing a plurality of sensor identifiers, a like plurality of axle identifiers and a like plurality of correlation information, such that a given sensor identifier is associated with a given axle identifier and given correlation information. The apparatus also includes a controller for: receiving from the receiver a message comprising a sensor identifier and an air pressure indication, utilitising the sensor identifier to obtain an axle identifier and correlation information, and utilising the correlation information and the pressure indicator to obtain a weight measure associated with the axle identifier. The apparatus may include a display for displaying the weight measure and the axle identifier.