HSM models were developed based on the data from States other than Texas. It would be logical to develop new models to address the HSM limitations and calibrate existing HSM models to Texas conditions. TxDOT has completed a couple of research projects which provided local SPFs or calibration factors for all types of facilities. These methods are incorporated into spreadsheet tools to be implemented in the new models. The implementation phase is currently underway which would provide hands-on trainings to TxDOT practitioners. Information regarding local SPFs and calibration factors can be found in

Appendix G, Section 6 – Safety Prediction Models.