The Dutch motorways are equipped with the motorway signalling system. This system warns for oncoming queues and may also be used for safeguarding incident locations. The same systems is used and is being extended in Sweden.
The motorway signalling system was developed over 20 years ago. Its principles have remained unchanged but many practical adaptations have been made. With the onset of in-car technology and vehicle-infrastructure communications, many new possibilities arise. With new ambitions for traffic management, such as dynamic lane usage and dynamic speed limits, new requirements are posed to the signalling system. So, the question is how to continue the development of the motorway signaling system given these new technologies and ambitions.