Composition for treating and stabilizing soils, in particular wet soils, comprising, in the form of a powder having a particle size less than 2 mm, quicklime andor calcium-based hydraulic binders, as well as a non-aqueous fluid additive capable of agglomerating the finer particles of the composition together. The vehicle operating data includes vehicle identification information. A display control portion displays a relation between the calculated average blood pressure data on a display portion in a prescribed display manner. The support legs include a plurality of movable units.