Prequels (Traffic NO2 Overlay)

Prequel overlays can be linked to the Traffic NO2 Overlay to base traffic intensities for calculations on, rather than basing it on roads and their Attributes in the project.

Name	Prequel	Underlying data	Unit	Range	No data	Description
Buses	BUS	Traffic NO2 Prequel	vehicles/h	0 - max value	0	Amount of bus traffic in any given location.
Cars	CAR	Traffic NO2 Prequel	vehicles/h	0 - max value	0	Amount of car traffic in any given location.
Trucks	TRUCK	Traffic NO2 Prequel	vehicles/h	0 - max value	0	Amount of truck traffic in any given location.
Vans	VAN	Traffic NO2 Prequel	vehicles/h	0 - max value	0	Amount of van traffic in any given location.

Notes

• A Prequel with a single timeframe will mean that value applies to all hours of the day. A Prequel with multiple timeframes is assumed to have 24 timeframes, with each timeframe representing a single hour of the day.
• In case a prequel is selected for a particular traffic type, the jam factor is still obtained from the existing roads, just as when no prequel is provided. The prequel only provides an alternative value for the number of traffic for that traffic type.

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Traffic NO2 Overlay

Model attributes

Base o3 • Base no2 • Hours • Emission no2 • Emission nox • Emission jam no2 • Emission jam nox • Min tree height m • Cars active • Vans active • Trucks active • Buses active • Road1 30m a • Road1 30m b • Road1 30m c • Road1 60m alpha • Road1 60m power

Traffic features

Num cars • Num vans • Num trucks • Num buses • Jam factor cars • Jam factor vans • Jam factor trucks • Jam factor buses

Prequels

Cars • Vans • Trucks • Buses

Result types

Concentration • Emission no2 • Emission nox • Treefactor • Trees