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ITS under byggtid - utvärdering med dynameq: Fallstudie: Intunnling av E4/E20 Tomteboda - Haga södra
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Traffic and Logistics.
2012 (Swedish)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Essingeleden in Stockholm is the most heavily congested road segment in Scandinavia and it is of

great importance for as well traffic within the city as for transit traffic. The capacity of Essingeleden

and Norra Länken is not enough to accommodate all traffic. At times it is not moving at all, which

results in long queues and an augmented risk of accidents. Consequently measures for increasing the

capacity on E4/E20, which will reduce congestion and the risk of accidents, are implemented by

Trafikverket. In fall 2012 one lane of three at Pampas will be closed and so will the exit from

Essingeleden to Norra Stationsgatan, called Parkeringsbron. No new connection will be in place until

2017. This implies that if no measures are taken the congestion will be exacerbated. The purpose of

the thesis was to study how ITS can be used to divert the traffic, with the aim of gaining an

accessibility that is as good as possible through the construction site at Norra Station, during the time

Parkeringsbron is closed. Thereafter an ITS

solution was suggested and evaluated using traffic

simulation. The problem was modelled with the mesoscopic simulation tool Dynameq, which like

microscopic models treats congestion and queue build

up and dissipation in a detailed way, while it

is an equilibrium model with consistent route choices, like macroscopic models. A Dynameq network

of Stockholm was available, but the work with coding and calibrating the model proved to be too

extensive, why the decision was taken that focus should be on having the network behave as

expected according to traffic flow theory and that evaluation and analysis should be done as

comparisons between scenarios. This implies that the model does not properly represent reality and

that the results thus not can be applied on the real scenario. Initially the cause was to evaluate

solutions to the problem using Dynameq, but during the work process more and more of the

software’s weaknesses were discovered, which makes it unsuitable for this type of analysis. There

are, among others are deficiencies in modelling of lane

‐choice and lane‐change and in route‐


modelling. An analysis was still performed and the result showed that large gains of travel time and

throughput can be made when an ITS

solution is implemented, if it is well planned and clear and

thereby leads to a large diversion rate. This contributes to a more efficient use of the road network

and shorter travel times for all vehicles.

Place, publisher, year, edition, pages
2012. , 95 p.
TSC-MT, 12-002
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-90890OAI: diva2:507217
Available from: 2012-03-02 Created: 2012-03-02

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