Abstract: The advisory speed meter is used to determine the advisory speed for a highway curve or to provide data for use in determining the advisory speed for a highway curve. The meter determines and records the maximum lateral horizontal acceleration experienced by a vehicle and occupants while traversing a highway curve. The meter has been extensively tested on rural curves and on entrance and exit and connecting ramps between all types of highways. The process for determining an advisory speed for a curve is described. The advisory speed meter provides accurate, reproducible data for use in determining advisory speeds for highway curves.