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Emissionsmodell för tunnlar
Swedish National Road and Transport Research Institute.
Swedish National Road and Transport Research Institute.
Swedish National Road and Transport Research Institute.
2004 (Swedish)Report (Other academic)Alternative title
Emission model for use in road tunnels (English)
Abstract [sv]

Tunnels for road and street traffic become increasingly important for

transport provisions, primarily in large cities. Currently, there are in

Stockholm and Gothenburg high-volume tunnels in the primary road network. In

addition, many new tunnels will soon be finalised or are planned both in

Stockholm and Gothenburg. The exhaust emissions in road tunnels may not

exceed certain limits. Road tunnels are equipped with ventilation systems to

make sure that limits for air quality are not exceeded, primarily emissions

of NO2. The ventilation systems are dimensioned using data on maximum

expected emissions per unit of time. VTI has obtained a commission from the

Swedish National Road Administration (SNRA) to develop a model for

calculation of exhaust emissions in tunnels, which in addition shall take

into account oversaturated conditions. Currently, SNRA has no satisfactory

model for calculations at hourly level. The objective of the development

effort has been to formulate a calculation model for travel speeds and

emissions in motorway tunnels, to be used when tunnel ventilation systems are

dimensioned. For a complete structure, the model shall provide individual

tunnel tube emission data for hourly traffic, split upon homogenous - from

the viewpoint of traffic engineering - road links and ventilation segments.

This report describes the results of the development project for calculation

of emissions in tunnels. The completed model comprises two parts, one for

calculation of speed and corresponding hourly flow at given demand level and

one for calculation of emissions, using hourly flows and speed as input data.

For each part, there is a computer program with user manual. Test runs of the

model for some basic typical tunnel cases, has been carried out to illustrate

the results of the total model. The total emissions of NOx (kg/km) as a

function of traffic flow have been calculated for different degree of traffic

load. In addition, the model has been validated by comparisons of calculated

NOx values from the model with measured NOx values in three different

tunnels: the Gnistäng tunnel and the Tingstad tunnel in Gothenburg and the

Southern Route tunnel in Stockholm.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut., VTI meddelande 968 , 2004.
VTI meddelande, ISSN 0347-6049
Keyword [en]
Swedish, Sweden, Tunnel, Emission, Model, Air pollution, Limit, Calculation, Speed, Traffic flow, Nitrogen oxide, Ventilation
Research subject
Road: Vehicles and vehicle technology, Road: Vehicles and the environment; Road: Traffic engineering, Road: Traffic theory
URN: urn:nbn:se:vti:diva-5146OAI: diva2:673976
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2013-12-03

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Carlsson, ArneHammarström, UlfKarlsson, Bo O
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