Impact of Heavy Vehicles on Traffic
summary
SUMO simulation models the three‑lane Pierre‑Laporte Bridge with fixed total flow (12,000 vehicles over two hours) while replacing cars by heavy trucks to measure delay; model uses 3 s reaction time and 10 m minimum gap, trucks accelerate and brake slower and cruise ~10 km/h below cars. Result shows an almost linear relation: 15% trucks ≈ +1 hour to clear, full run time reaches about 10,118 s, so small increases in truck share substantially lengthen rush‑hour duration.
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