Dynamically vary auto-generated Variable Speed Limits (VSLs)

Highways England is currently undertaking a programme of improvements to Variable Speed Limits (VSLs) on the motorway and all-purpose trunk road network. This is to improve the appropriateness of both mandatory and advisory VSLs, based on safety and customer insight. There are occasions when our algorithms and signal sequencing rules automatically set default variable speed limits that are thought to be overly restrictive. For the most part, these algorithms set appropriate speed limits to suit most situations, but there are some situations where it is believed that being able to manually…