A control system (100, Figure 1) for determining a suspension calibration of a vehicle 800 and corresponding method are provided. The control system has one or more controllers (120, Figure 1) that receive route data indicative of a route ahead of the vehicle 800. One or more processors (130, Figure 1) determine, from the route data, a prediction of a first acceleration at a first location 320 ahead of the vehicle 800 and a second acceleration at a second location 330 ahead of the first location 320. The one or more processors determine a suspension calibration of the vehicle 800 in dependence on the second acceleration. The actual acceleration of the vehicle 800 is measured al the first location 320 and compared with the first acceleration. If the measured and first acceleration are within a predetermined tolerance, the processor produces a suspension control signal at output which is received by a suspension controller (140, Figure 1) to apply the suspension calibration prior to the vehicle 800 arriving at the second location 330.
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