The current navigation map data does not contain information regarding the cognitive load associated with the navigation related entities on the road (i.e., road segments, junctions, manoeuvers, etc.). The associated root cause as well as the optimum guidance information to address the cognitive load is not a part of the current navigation map data. There is no mechanism to create and store this as a part of the current navigation map data. Cognitive load /stress levels on different parts of navigation have a significant impact on road safety, but the navigation map data does not integrate this information to support these cases related to cognitive load while navigating, to reduce the stress associated with navigation. Routing based on cognitive load associated with the route is currently not possible. This paper demonstrates an effective method of integration of cognitive load levels to navigation map data using HERE map as well as technologies offered by HERE Technologies as a reference for creating the necessary infrastructure for the integration of human cognitive load to navigation map data.