Many factors should be considered in order to understand properly how a mechanical input to the head can result in a determined type of head injury: the severity, the nature of the mechanical input, the impact location, the direction of this input, the age of the patient, his gender, anthropometrics and previous state, and also the treatment and recovery of the patient. Head injuries are either the most or second most commonly reported injuries to pedestrians struck by vehicles. Furthermore, among serious or life-threatening head and brain injuries far outnumber injuries to all other body regions. Around 40% of the adult head injuries are due to windshield impact. Windshield modeling is currently a challenge in head pedestrian protection, the way the windshield breaks introduces a significant change in the Head Injury Criteria, and this is due to the non-lineal fracture that the glass is presenting during the headform collision. In this paper a new model for windshield pedestrian impact is presented for optimizing experimental-simulation correlation. In this research a total of 90 experimental windshield test were performed, the head impacts were simulated using the software ANSA+PAMCRASH+META. The model was optimized through parametric adjustment methods. With this present model the average HIC deviation between testing and simulation has been reduced in average below 10%