I've played with the thought of doing something like this to create a tool for assisting (and perhaps evaluating) drivers of buses:

* make a device that logs acceleration in various directions and performs suitable statistical analysis in real time. * combine it with passenger evaluations of ride behavior (tell users to press a button when the ride is uncomfortable) to train a neural net to evaluate ride smoothness * install devices in all buses, with a display placed in front of the driver that shows current ride comfort and warns if things get too problematic