ITRE will contribute towards updating the current freeway facility chapter of the HCM. through the identification and resolution of knowledge gaps, most notably in the integration of reliability and ATDM effects, the addition of research findings on work zones, truck effects and managed lanes, the development of initial HCM chapter drafts, the development of appropriate example problems in those chapters and developing and integrating existing and revised computational engines to supplement the current procedure in the areas of ATDM and reliability.