City Traffic

0 on the map

0 arriving/h

0 s trip

0 s delay

0 stops/trip

0 waiting in

0 ran red

0 crashes

0 min

Gridlock: nothing has moved through a crossing for a minute.

Click a road to put the car back · Esc cancels

RUSH HOUR

HEAT WAVE

stopped

speed limit · lights: one dot per turn, left to right · ▲ blocked road · drag to move, wheel to zoom · click a car to follow it, double-click a standing car to push it on

Space-time diagram

One street, from where its traffic comes in (left) to where it leaves (right); time runs downwards. A vehicle is a line slanting right. A queue at a red light is a red band growing to the left. Ticks show each light on the street. Pick another street: select a road on the map and press "show in space-time".

Over time

Finished runs

Save a run after a while, change the lights, restart, run as long, save again and compare. Same map, traffic and seed give the same cars.

Selected

Click a crossing to run its lights, a road to block it, or a vehicle to follow it.

All lights

Lights

Traffic

Vehicles/hour Main flows Trucks & buses Reaction delay Don't block the box (enter a crossing only if there is room after it)

Heat wave insanity

Reckless drivers

Up to 15% of drivers turn reckless: some speed (40% over the limit), some run red lights, some are aggressive (follow too close, never give way, block crossings, cut in, and do not always look, so they crash). Reckless cars have a red ring.

Main flows: the share of traffic on the map's main routes; the rest spreads over all entry-exit pairs. Everything changes live.

Between city parts

Vehicles that drove from one part of the city into another in the last 10 minutes (rows: from, columns: to).