I haven’t read it yet, but the journal article this blurb is about is currently open access. Sharing it because I absolutely love this type of thing. I knew someone in school who was doing similar research with accelerometers on vehicles to try and assess the stiffness of the whole span. I think I sounded weird when I told him this irl, but I literally like to go to sleep thinking about being able to make measurements so indirectly and passively.