Prequels (Traffic Noise Overlay)

Prequel overlays can be linked to the Traffic Noise 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 Noise Prequel	vehicles/h	0 - max value	0	Amount of bus traffic in any given location.
Cars	CAR	Traffic Noise Prequel	vehicles/h	0 - max value	0	Amount of car traffic in any given location.
Trucks	TRUCK	Traffic Noise Prequel	vehicles/h	0 - max value	0	Amount of truck traffic in any given location.
Vans	VAN	Traffic Noise 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.

---

Traffic Noise Overlay

Model attributes

V0 • Emission start • Emission mult • Hours • Background db • Cars active • Vans active • Trucks active • Buses active

Traffic features

Num cars • Num vans • Num trucks • Num buses

Prequels

Cars • Vans • Trucks • Buses

Result types

Noise db • Emission