Traffic demand
Demand mode defines where vehicles enter the network, how many arrive, where they are headed and who is driving. Everything is expressed in familiar engineering terms — vehicles per hour, destination shares, vehicle classes.
Traffic sources and destinations
Click a road to place a traffic source on a specific lane, then click other roads to add destinations for it. Each source has a demand in veh/h and an active toggle; each destination carries a share, so one source can split its traffic 70/30 between two exits. Vehicles choose their own lanes and routes toward the destination — you specify intent, the simulation handles the driving.
The left panel lists all sources with their demand and destinations; selecting one fills the inspector with its full configuration.
Vehicle and driver mixes
Each source generates traffic from a vehicle mix (cars, SUVs, trucks by default) and a driver mix (cautious, average and aggressive commuter profiles by default). Sliders set the share of each profile per source, so a motorway source can carry more trucks than a residential one.
Profiles themselves are editable: vehicle profiles define physical characteristics, driver profiles define behavior parameters used by the car-following and lane-change models. You can create new profiles, duplicate and adjust existing ones, and save favorites to a personal profile library that can be exported and imported across projects.
Seeding demand from traffic counters
Where public traffic-counter networks are available, Demand mode can show measured flows directly on the map: enable “Show on map” under Traffic counters and click a counter pill to create traffic sources carrying its measured flow — directional stations create one source per direction. Supported networks currently cover Iceland (Vegagerðin and City of Reykjavík), the Netherlands (NDW), Finland (Fintraffic) and France (Bison Futé); the source used is chosen automatically from the import area.
Live counter readings are a paid-plan capability, and historical counter data (the demand “time machine”) is available on Team and Enterprise plans.