For building prediction models, a mapping of the ground truth data and the accelerometer data is necessary.
Thus, for bringing laser measurements (e.g. referenced by starting position and driving offset) and accelerometer measurements (referenced by gps fixes) together, we need to map them on unique (e.g. OSM based) segments (e.g. 100m segments).
Assuming an point to point approach (start and end point of an road link) with relative offsets for defining the segments in between is a good way to go.