Copenhagen was one of eight European deployment sites in C-MobILE, an EU-funded project testing cooperative intelligent transport systems (C-ITS) in real traffic conditions. The wider project ran from 2017 to 2020 and aimed to make C-ITS services interoperable across countries and practical to deploy at scale, while addressing safety, congestion and environmental impacts in urban areas.1311
In Copenhagen, the work focused on giving road users—including drivers and cyclists—timely information about traffic signals, roadworks and hazards. The Danish ITS progress report describes services such as Green Light Optimal Speed Advice (GLOSA), roadworks warnings and road-hazard warnings, delivered mainly through cellular communications. The city also equipped 50 signalised intersections with 5G-based roadside stations.8
The project tested how vehicles and transport infrastructure could exchange information using both cellular networks and short-range ITS-G5 radio. In 2018, vehicles demonstrated GLOSA interoperability between Copenhagen and Bordeaux during the ITS World Congress in Copenhagen.12 The broader C-MobILE approach grouped services into areas including urban efficiency, infrastructure-to-vehicle safety, traffic efficiency and vehicle-to-vehicle safety, with cities able to adapt them to local traffic and regulatory needs.7
C-MobILE brought together public authorities, researchers and companies. Copenhagen Municipality and Dynniq Denmark are listed among the Danish participants; Applus+ IDIADA coordinated the wider project.712 The project also convened city authorities through workshops to exchange practical experience and discuss deployment challenges.1 Its stated ambition was to support continued, sustainable use of C-ITS beyond the pilot phase, though the available sources do not establish the long-term operating status of Copenhagen’s services.3