In 2012, the then-Mayor of London set up the Roads Task Force to consider how to tackle the challenges facing London's roads. It recommended that London's 34 traffic authorities use a new 'street family' as a practical way to understand the mixed use of our roads.
Five pilot studies tested different ways of categorising streets before work began using the chosen method in September 2014.
The process uses a series of workshops to consider the 'movement' and 'place' functions of each road separately. These are then combined and each road is classified according to nine street types and represented on a final map.
Instead of describing the quality of a road, the final map illustrates common agreement on its current function. The map also helps decision makers understand the amount of change needed when planning for the future and can be refined as roads evolve and new data emerges.
The aim of Street Types is to help planners work together to ensure customers get a consistent level of service on TfL and borough roads, whether they are travelling by foot, bicycle, bus or car.
Street Types will be used by us as well as London's boroughs and other stakeholders to deliver appropriate schemes in the right locations.
More than 21 million trips take place on the Capital's road network each day so it's important that we work together to plan how travel may change in the future.
The development of Street Types was a significant undertaking, involving more than 400 experts from TfL, the GLA and London's boroughs and 70 workshops. By working together we were able to classify all roads in London, not just those for which we have data.
It recognises the role of the street network in civic life but also highlights where areas are under intense pressure to help people move.