synchro

Lost time Adjustment Synchro
Traffic Engineering, Trainings, Transportation Planning

Lost Time and Lost Time Adjustments in Synchro

In signalized intersection analysis, few parameters influence results as strongly and as quietly as lost time adjustment. When using Synchro or applying the Highway Capacity Manual (HCM) methodology, adjusting lost time can significantly change: Because of this sensitivity, lost time adjustments must be applied carefully, transparently, and defensibly. What is Lost Time? Lost time in […]

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Saturation Flow Rate vs Lane Utilization Factor
Traffic Engineering, Trainings, Transportation Planning

Lane Utilization Factor and Saturation Flow Rate in Signalized Intersections

When performing signalized intersection analysis in tools such as Synchro or HCS, two commonly misunderstood parameters are Lane Utilization Factor (LUF) and Saturation Flow Rate (s). Both directly influence delay, capacity, and level of service calculations under the framework of the Highway Capacity Manual (HCM). This article provides a clear technical explanation of both terms

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