I'm looking for some open source programs or any software you can recommend for weigh-in-motion (WIM) data analysis as part of my M.S. thesis. The WIM data is for input in the mechanistic-empirical pavement design method. Particularly, I want to develop the traffic distribution by class (FHWA scheme) and a load spectra. I would like to welcome any suggestions or recommendation on what analysis software I could use. Your help would be greatly appreciated.