WinPROKAS

... Traffic-related Emission and Immission Calculation

WinPROKAS is a software system for calculating and visualizing traffic-related air pollutant immissions, including the corresponding emission calculations. As modern stand-alone software, WinPROKAS continues the previous application SELMAGIS PROKAS in an independent, powerful, and practice-oriented environment.

The software offers a project-based, intuitive, map-driven user interface and supports common GIS formats and map services, including Shapefiles, WMS services, and OpenStreetMap. Different coordinate systems such as UTM can also be used easily. WinPROKAS thus integrates seamlessly into existing workflows for air quality planning and immission assessment.

Features at a Glance

WinPROKAS covers the complete workflow from data acquisition to results visualization:

• Digitization tools for capturing and editing road emission sources
• Roseplot for visualizing, editing, and generating dispersion class statistics and meteorological time series
• PROKAS_E for calculating vehicle-related emissions based on pre-calculated emission factor tables
• Receptor points / immission locations for interactively defining immission sites and generating point grids
• PROKAS Navigator for structured consolidation of all input data and for launching the dispersion calculation
• Total load for overlaying additional and background loads, including consideration of the chemical conversion of NO to NO₂
• Layout for area-wide visualization, graphical output, and printing of results using custom layout templates

PROKAS_E: Emission Calculation for Road Traffic

With PROKAS_E, vehicle-related emissions of relevant pollutants for a given road network can be calculated precisely and transparently. The basis consists of pre-calculated emission factor tables, which allow emissions to be determined individually for each road segment.

The calculation uses traffic-specific input data such as traffic situation, average daily traffic volume, heavy vehicle share, and optionally detailed vehicle counts by vehicle category. This information is provided in SD3 format based on the ESRI Shapefile format. In addition, emission factor tables in EFT3 or EFTK format are used for the desired reference years.

PROKAS_E offers, among other things, the following functions:

• Loading and validating input files
• Free selection of pollutants to be calculated
• Consideration of congestion shares, for example in queue areas at traffic lights
• Mapping of deviating non-engine-related PM10 emissions, such as in tunnels or with poor road conditions
• Output of emissions per road segment as a total sum or broken down by vehicle category or vehicle group
• Writing calculated emissions to the SD3 file
• Additional documentation of key calculation information and emission factors in a project log file in Excel format

PROKAS_E thereby creates a reliable foundation for the subsequent dispersion calculation while ensuring transparency and traceability throughout the entire emission modeling process.

Flexible Emission Factors for Realistic Assessments

A particular advantage of PROKAS_E lies in the flexible consideration of different emission factors. Typically, the tables used are based on the current HBEFA and reflect different reference years and vehicle fleet compositions.

In addition, region-specific fleet compositions can also be taken into account. This allows realistic mapping of, for example, differences between federal states, deviating diesel shares, or special distributions by Euro emission standards. Separate emission factor sets can also be created for low emission zones where the vehicle fleet differs significantly from general average values.

Individual questions can also be addressed in a targeted manner, such as:

• Special fleet compositions in individual regions
• Specific boundary conditions in low emission zones
• Heavy vehicle restrictions for certain vehicle classes
• Consideration of municipal bus fleets

High-Performance Dispersion Calculation for Road Traffic

The integrated dispersion model PROKAS comprises the modules PROKAS_V and PROKAS_B and enables the calculation of traffic-related immission concentrations for different urban development situations.

PROKAS_V is based on the Gaussian approach in accordance with VDI 3783 Part 1, with special modifications for motor vehicle traffic. Any number of road segments within a road network can be processed. Based on a local dispersion class statistic, PROKAS calculates, among other things, annual mean values as well as PM10 daily mean value exceedances. The results are output in a way that allows comparison with the assessment values for the protection of human health in accordance with the 39. BImSchV.

PROKAS_B is designed for densely built-up areas and street canyons. The module calculates the additional load particularly in cases of partially or fully closed surrounding development, using results from microscale dispersion calculations with MISKAM for typical building structures. This enables realistic assessment even of complex inner-city situations.

Your Advantages with WinPROKAS

• End-to-end workflow from emission calculation to immission visualization
• Modern stand-alone solution as the successor to SELMAGIS PROKAS
• Intuitive, map-based operation for project-oriented work
• Support for common GIS standards and map services
• Flexible calculation for free immission locations, point grids, roadside and street canyon situations
• Realistic emission modeling through differentiated emission factors
• Results processing for technical assessments and clear presentations

Hardware Requirements