A package of computer programs for analysis and computation of vibrational intensities in infrared spectra based on the bond polar parameters model has been developed. Provided that an accurate force field for a molecule is available and the integrated infrared band intensities reliably determined, the experimental intensity data are transformed without any further assumptions or approximations into a set of independent empirical parameters associated with stretchings and angle deformations of individual valence bonds. The physical significance of the local intensity parameters is assessed by comparing parameter values evaluated from experimental gas-phase intensities for several series of structurally related molecules: various halomethanes, hydrides, and unsaturated and saturated hydrocarbons. In most cases satisfactory qualitative correlations between intensity parameters and quantities related to the electronic structure of the respective bonds have been found. Certain type of bond polar parameters can be considered as characterizing bond properties analogously to diagonal force constants. The transferability of intensity parameters is tested in calculations aimed at combined predictions of vibrational frequencies and intensities for some hydrocarbons. Particularly advantageous is the possibility to compute infrared spectral curves for individual conformers.