A method of enhancing global navigation satellite system performance includes the steps of (A) determining position information based upon (i) global navigation satellite system information, (ii) dead reckoning using one or more sensor inputs, and (iii) a correction signal, (B) when the global navigation satellite system information is unavailable, adjusting the position information and generating the correction signal based upon pre-defined map data, and (C) when the global navigation satellite system information is reacquired after being unavailable, suspending the dead reckoning for a predefined amount of time.