Intersection Capacity Utilization
Syncho 5.0, the LOS analysis software, also calculates Intersection
Capacity Utilization (ICU) which provides additional insight as
to how well an intersection is functioning and how much extra capacity
is available to handle future growth, traffic fluctuation and incidents.
The ICU calculation does not use existing signal timings or sign
control. It simply calculates the ultimate capacity based on a fully
protected, optimized signalized timing plan at a cycle length of
120 seconds. Descriptions of ICU criteria are included in Table
ICU is intended to provide information for traffic planning purposes,
such as traffic impact studies, future roadway design and congestion
management programs. The ICU value will provide an estimation of
residual capacity at signalized intersections. For un-signalized
intersections, the ICU provides insight as to how well the intersection
would function if it were signalized.