Gridlock: the city without a fitness function

Gridlock: no fitness function

Nobody scores these cars. Each has a wallet: fares pay in, fuel, wear and crash damage pay out. A car that saves enough has a child, a mutated copy of its brain and its body. A car that goes broke is gone. Passengers tip for speed, freight pays by the load, and there is only so much of either. The generation-based city.

What am I looking at?

Every car is coloured by species (or by its current job: blue a passenger, yellow freight, grey nothing to do). The white one is the richest, or the one you clicked.
Nobody is scored. A car earns fares, pays for fuel, upkeep and crashes, has a child when it saves enough and is gone when it goes broke.
A day is 24 minutes: rush hours at 8:30 and 18:00, freight in business hours, and at night the city empties and the headlights come on.
Species over time and the family tree show who is winning; Bodies plots every car's cargo room against its top speed.
Nobody told them which side of the road to drive on. Watch the number and its chart: in a busy city one side usually wins within a few days, and which one is chance. Heatmap (H) shows where they crash, or crawl.
On Turin, Barcelona and Manhattan the chevrons are real one-way streets.
Edit roads: click a street to make it one-way, then the other way, then closed, then two-way again, or drag from junction to junction to build one; Grow adds a district; Pedestrians adds people who have to get across; Congestion charge makes full roads cost money, Speed camera fines anyone over 35, Freight boom makes trucks worth evolving, Finish the fare stops passengers vanishing with a car that went broke, Insurance pools the cost of crashes.

drag to pan, scroll to zoom, space to pause, click a car to follow it, double-click to reset the viewdrag to pan, pinch to zoom, tap a car to follow it, double-tap to reset the view

The city

time of day-

cars-

passengers / loads waiting-

born / died, last hour-

side of the road-

empty trips, last day-

passengers delivered, last day-

crashes / trips per car, last hour-

mean wallet-

oldest lineage, generations-

species-

people / hit per 100 crossings-

Species over time

each band is a species, its height how many cars belong to it

Fares delivered

fares delivered each city hour, last four days, with the busiest hour marked: switch a rule on and watch what it does over the following days

Side of the road

share of cars on two-way roads right of the middle, hourly, last four days: top is all right, bottom all left

Family tree

every line is a birth, from parent to child, placed by when it happened (across) and how many generations deep (up). The white line is the selected or richest car's ancestry.

Bodies

every car: cargo room across (square-root scale; the shaded side can take freight), top speed up, coloured by species

Richest car

wallet / earned-

generation / children-

length x width, mass-

top speed / cargo room-

current job-

Lineage

founder / generations-

each ancestor back to the founder, left to right, drawn to the size of its body and brighter the more it earned in its life; below, the share of the city's cars in this family, hour by hour

Controls

Run and speed

View

Junctions

City size

Change the city

Any city

Rules

Time and sharing