AirWare   On-line Reference Manual

  Release Level 5.4
  Release Date 2008 10
  Revision Level 1.0
Last modified on:   Monday, 20-Jul-09 14:03 CEST

Line sources

Line sources represent street or road segments and hold their emission data. They are, in principle independent entities ([set of] polylines, i.e., possibly with unconnected segments) but can part of a topological road network as used by any traffic model such as EMME/s or VISUM.

A Line Source is a named OBJECT. If it is associated with a network, its position and geometry is supplied by that network; else, the coordinates of its start and end node are specified with the line source directly.

LIne Source descriptions consists of the standard OBJECT header and META DATA. It is characterized by its position and length, and it is shown on the associated MAP.

The set of data/attributes that define the line source data structureDescriptor (defined in the systems knowledge base) in the HTML TEMPLATE that defines the object display and eidtor.

The attributes of a line source include:

  1. name, administrative designation (number or ID), road type, length, number of lanes [optional: surface, slope, road networklink, fleet composition link].
  2. symbolic georeference to a model domain;
  3. vehicle frequency total (with optional vehicle class specific values)
  4. average speed;
  5. Substance specific emissions in g/s/km.
  6. optional scaling factor and additive term for each pollutant.

Traffic generated pollutants

Traffic generated pollutants covered by a line source include:
  1. NOx
  2. CO
  3. PM10, PM2.5
  4. VOC

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