To carry out temporary installations during construction, which includes a radio communication system, computer network as well as systems for positioning and passage control systems and evacuation alarms for the extension of the Blue Line to Barkarby and the Yellow Line to Arenastaden. The system will be utilized at several different stages and by several contractors during the execution of the project to be installed, maintained and dismantled before the plant is put into regular operation.

To carry out temporary installations during construction, which includes a radio communication system, computer network as well as systems for positioning and passage control systems and evacuation alarms for the extension of the Blue Line to Barkarby and the Yellow Line to Arenastaden. The system will be utilized at several different stages and by several contractors during the execution of the project to be installed, maintained and dismantled before the plant is put into regular operation.