// multi-utility computation suite · offline · instant · precise
┌──────────────────────────┐
│ [c] calcalyst_ │
│ computation suite │
└──────────────────────────┘
// select a module to initialize
/ search↵ open firstesc close
// adsenseEMPTY_LEADER_SLOT728×90
// adsenseMOBILE_ANCHOR_SLOT320×50
// keyboard_shortcuts
/focus search
↑↓navigate module list
Enter
open first result from search
open highlighted
compute when module is open
compute when focused in a field
Escclose module · clear selection
⌫
sci.highway-capacity-PCE-adjustment Calculator
Calculates highway capacity adjustment from base 2,200 pcphpl using passenger car equivalents (PCE) for trucks and recreational vehicles. PCE for trucks on 5% grade: 4–6 — heavy trucks on steep grades significantly reduce effective lane capacity, requiring truck climbing lanes on mountain highways.
Inputs
Flow Veh Hr
Three-dimensional space occupied (m³ or L). 1 m³ = 1,000 L.
Pct Trucks
Age in completed years. Many health and fitness formulas adjust for age.
Et Trucks
Reference formula or conversion factor shown for context.
Fw Lane Factor
A multiplier applied in the calculation.
Lanes
Count of items or occurrences.
Results
passenger car equivalents/lane v_p (pc/hr/ln)
Sample size or count used in the calculation.
volume/capacity ratio (v/c)
The computed three-dimensional volume.
heavy vehicle factor fHV
A dimensionless multiplier applied in the calculation.
total lane capacity (pc/hr)
The combined total across all inputs and components.
fHV = 1/(1 + PT(ET−1)) | v_p = v/(fHV·fw·N)
Sample size or count used in the calculation.
LOS classification
Category assigned based on where the computed value falls on a defined scale. Check which standard or guideline defines these boundaries.