Imflow in Valby - A case of implementing an adaptive traffic control system
Author
Wandall, Niclas Højgaard
Term
4. term
Education
Publication year
2016
Submitted on
2016-06-01
Pages
54
Abstract
This thesis examines the implementation of Imflow, an adaptive traffic control system, in Valby, Copenhagen, as part of the city’s ambitions for green mobility and CO2 neutrality. The study investigates issues that arose during the planning, installation, and operation of Imflow, maps the actors and technologies involved, and considers the project’s future role in Copenhagen’s traffic management. Imflow was procured to replace the induction loop–based Motion system and was deployed at 10 intersections to prioritize bus travel times—especially for lines 18 (now 8A), 1A, and 4A—and to reduce waiting times for pedestrians and cyclists. Using a qualitative case study grounded in Actor-Network Theory, the analysis traces actor-worlds, translations, and intermediaries across the municipality, the system supplier (Imtech/Dynniq), the public transport agency, consultants, and academic experts. Data were collected primarily through interviews with key stakeholders. The case highlights several implementation challenges, including delays and, once the system became operational, a lack of valid baseline measurements, which complicated assessment of Imflow’s effects. The thesis discusses how technical, organizational, and contractual relationships shaped these outcomes and outlines considerations for evaluating and scaling adaptive traffic control in Copenhagen.
Dette speciale undersøger implementeringen af Imflow, et adaptivt trafikstyringssystem, i Valby, København, som led i byens ambitioner om grøn mobilitet og CO2-neutralitet. Studiet belyser problemer, der opstod under planlægning, installation og drift af Imflow, kortlægger de involverede aktører og teknologier og vurderer projektets fremtidige rolle i Københavns trafikstyring. Imflow blev indkøbt som afløser for det induktionsspolebaserede Motion-system og blev udrullet i 10 signalregulerede kryds for at prioritere bustider—særligt for linje 18 (nu 8A), 1A og 4A—samt reducere ventetid for fodgængere og cyklister. Med en kvalitativ casestudie-tilgang forankret i Aktør-Netværksteori sporer analysen aktørverdener, oversættelser og intermediærer på tværs af kommunen, systemleverandøren (Imtech/Dynniq), trafikselskabet, rådgivere og forskere. Data blev primært indsamlet gennem interviews med centrale interessenter. Casen fremhæver flere implementeringsudfordringer, herunder forsinkelser og, da systemet kom i drift, mangel på gyldige reference-målinger, som gjorde det vanskeligt at vurdere Imflows effekt. Specialet diskuterer, hvordan tekniske, organisatoriske og kontraktmæssige relationer formede disse udfald, og skitserer overvejelser for evaluering og skalering af adaptiv trafikstyring i København.
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