Traffic Model
Traffic model in the Tygron Platform
The purpose of the default traffic model in the Tygron Platform is to calculate the effects of traffic on the 3D World through traffic intensity. In order to calculate this impact, data such as the number of lanes, traffic speed and the traffic intensity on a particular road can be added to the project. The traffic model is a static model that does not change by carrying out Actions, Upgrades or Measures for example. Read below how to create your own dynamic traffic model and use it in the Tygron Platform. The following (dynamic) overlays show data from/effects of the traffic model:
Traffic data
Height offset
This field specifies the height offset of a bridge.
Units per hour
This field specifies the traffic intensity: the number of units that drive on the road in an hour. For the data source, see Traffic_Model#Traffic_intensity
Lanes
This field specifies the number of lanes that a road can have.
Noise Sigma
This field specifies the correction factor at reference traffic speed [1].
This value is used in the calculation of the Traffic Noise (Overlay).
Noise Tau
This field specifies the correction factor per 10 km/hour deviation from reference traffic speed [2].
This value is used in the calculation of the Traffic Noise (Overlay).
Speedlimit
This field specifies the max allowed speedlimit on road or part of a road.
Data sources
When creating a new project a traffic model is generated for the selected project area, based on available open data sources. The following datasets are used:
Traffic intensity
The traffic intensity is depicted in the Platform by the Units per hour attribute (in the software named TRAFFIC_FLOW).
The traffic intensity comes from:
INWEVA 2015
Traffic intensity for highways
VI-Lucht & Geluid See also: https://www.infomil.nl/onderwerpen/lucht-water/luchtkwaliteit/slag/hulpmiddelen/inschatten/ Excel based traffic model for estimating traffic intensity based on characteristics of a road:
- Traffic speed
- Is it a one way street or not?
- Is the road inside an urban area or not (NL: binnen of buiten de bebouwde kom)?
- Is there a separate cycle path along the road?
- Are there more than 2x2 lanes?
- Is parking along the road possible?
These characteristics combined with the urbanization factor, determines the type of road. In the Excel model, the different road types have different average traffic intensities. The average daytime traffic intensity is converted to an hourly value to be used for the TRAFFIC_FLOW attribute.
Add a custom Traffic Model
It is also possible to creata and add a custom traffic model, better suited for your use case. The traffic model can be either a static model (the model and data do not change in the project) or a dynamic model (the model and data change when something in the 3D world changes).