Summary:

This paper presents a simplified method of assessing the impact of
a motorway under construction on arable lands. The method allows to determine all the losses connected with the building of a motor-way impact. A basis for the determination of losses is the analysis of variations in land use, soil quality classes, and the layout of agricultural roads along the designed motorway. The measure assumed as a multilateral impact of motorway on arable lands; is a specific variant of lands value. The specificity of this value variant is in the fact that while determining it, only the variation in the usefulness to agricultural production is assessed. Therefore, it is a measure to valuate arable land usefulness in the
agricultural production. Thus, this assumed measure of the motorway impact is not a market value. The estimated land value will be similar to its market value only in typical agricultural regions where the key parameter to mould the land price is production potential of such lands.
The presented method of assessing the motorway impact on arable land is exemplified by a section of ‘A-4' motorway; this section is about 4 km lenght, it runs between two towns: Zaczernie-Nowa Wieś. One kilometre of this motorway constructed will result in the decrease of the arable land value by 1500 corn units.
The value of arable land will decrease by around 73% because the con-struction of motorway, and because of the toxic impact of the motorway on soils. The remaining 27% of losses in the land value results from the increase in the transport and from the deteriorated spatial arrangement of plots.