We examined the relationship between three data types--geologic maps, measurements of pavement deflection under load, and seismic refraction data-- from diverse geologic settings in Texas to determine (1) whether geologic maps and seismic refraction data might be used to interpret deflections and assess pavement condition and (2) whether deflections and refraction data acquired on pavement might have geologic applications. Engineers assess pavement condition by applying a known load to a road and measuring vertical pavement deflection using the Falling-Weight Deflectometer (FWD).