TrafficWeave

free flow

click a lane to drop a slow truck · right-click clears trucks

space–time · speed

0v₀

Run

Presets

Highway

Lanes

Density 22

Driver model · IDM

v₀ desired 110 km/h

T headway 1.40 s

p polite 0.25

Trucks

Slow trucks cap at 72 km/h and act as a bottleneck. Watch a backward-propagating jam wave appear on the space–time strip below.

About

Each car runs the Intelligent Driver Model for following + MOBIL for lane-changing. The road is periodic — push density past ~28 cars/lane and stop-and-go waves emerge from nothing. That's the phantom jam.