Traffic

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Congestion
Measures how busy the road traffic is. Lower congestion will improve citizen happiness and city desirability.

Public Transit
The Sky Rail Station, Bus Depot and Bus Stop reduce nearby traffic congestion.

Accessibility
Measures whether different zones types have sufficient access to other zone types.

For example, 10 residential zones should ideally connect to 10 industrial zones. Additional residential zones would require additional industrial zones to be connected.