// multi-utility computation suite · offline · instant · precise
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eng.level-of-service-HCM-freeway Calculator
Calculates freeway Level of Service from flow rate in pc/h/ln and Free Flow Speed using HCM 6th edition methodology. At capacity flow (2,400 pc/h/ln), the LOS is E — breakdown occurs above capacity and triggers the LOS F queue propagation.
Inputs
V Veh Hr
Three-dimensional space occupied (m³ or L). 1 m³ = 1,000 L.
N Lanes
Count of items or occurrences.
Ffs Km H
Rate of movement. 1 m/s = 3.6 km/h = 2.237 mph.
Phf
A multiplier applied in the calculation.
Fhv Pct
A multiplier applied in the calculation.
Results
flow rate vp (pc/hr/ln)
The value at the specified point or condition.
density (pc/km/ln)
Sample size or count used in the calculation.
Level of Service
The measured or computed level on the applicable scale.
HCM 6th edition thresholds
Sample size or count used in the calculation.
PHF-adjusted flow
pH of the solution. Below 7: acidic. 7: neutral. Above 7: basic (alkaline).
capacity note
Supplementary information explaining an assumption, caveat, or important context for interpreting the result.