There are four files corresponding to the study. suspension_dataset.mat - This file contains the dataset corresponding to the body and tyre displacements that are subject to input road profiles generated based on ISO 8608. ISO8608_dataplotting.m - This file is used to plot the ISO 8608 input road profile classes A to E for both the non-suppressed dataset and the harmonic-suppressed dataset, as well as the associated body and tyre displacements. StateSpace_Subspace.m - This file is used to perform linear system identification using State Space Subspace approach. Hammerstein_Wiener.m - This file is used to perform nonlinear system identification using Hammerstein-Wiener model. This dataset has been used in the following publications: Tan, A.H., Foo, M., Ong, D.S. (2022). Road classification using built-in self-scaling method of Bayesian regression. Journal of Sound and Vibration 516, 116523. Tan, A.H., Foo, M. (2025). Kernel design for estimation of resonant systems: A case study on vehicle suspension. Mechanical Systems and Signal Processing 234, 112875.