Analysis Approach The operational performance of a segment, either individually or within a facility, is reported for the end of the segment, rather than corresponding to an aggregated value across the full length of the segment. Thus, the reported values are point estimates of performance and are not necessarily representative of average conditions along an extended length of segment. This approach makes it easier for practitioners to use field-measured point values to directly calculate LOS with the method and to use point values to validate method outputs. Nevertheless, when considering multiple contiguous segments as a facility, the point measure is used as the estimate of the performance of a given segment. From a traveler’s perspective, the conditions at the end of a segment (particularly passing zones) probably factor more heavily into their assessment of the quality of service. For passing lane segments, additional calculations are performed.