a method for auto - calibrating parameters in traffic prediction . the method includes determining a first subnet of traffic links that is associated with a plurality of traffic links in a traffic network . the method includes determining a second subnet of traffic links that is associated with the first subnet of traffic links and has a first traffic predicting accuracy value . the method includes generating a set of optimized traffic predicting parameters associated with the second subnet of traffic links , and applying the set of optimized traffic parameters onto a third subnet of traffic links . the method includes determining the set of optimized traffic predicting parameters used to calculate prediction results having a second traffic predicting accuracy value , and applying said set of optimized traffic predicting parameters to subnets associated with the traffic network . further , the first traffic predicting accuracy value is lower than the second traffic predicting accuracy value .