PTV Group has been appointed as one of the framework contractors for three years retaining its position as the Operational modelling software provider to TfL in the categories of Tactical (PTV Visum) and Microsimulation modelling (PTV Vissim).
PTV Visum is the software used by TfL for the development of the Operational Network Evaluation (ONE) model, a tactical highway assignment model for London, the largest of its type in the world.
An earlier version of the ONE model, covering the central London road network, was successfully used for the operational modelling of the Olympic Route Network for the London 2012 Olympic Games. The ONE model is currently being expanded by TfL to cover the geographical area of London within the M25 orbital motorway.
PTV Vissim has been retained by TfL as the operational modelling software for microsimulation modelling. TfL has been using Vissim for more than 10 years and is currently developing a whole suite of microsimulation models for the Transport for London Route Network (TLRN), including 23 key road corridors that play a strategic role in London's road network.
The corridor models are being used by TfL to assess the operational capacity and performance of the road network, the impact of proposed developments and infrastructure schemes, as well as measure the Journey Time Reliability of corridors. One example PTV gives is TfL's development of an award winning UTC-Vissim Interface which is used to carry out simulation of the adaptive traffic signal control system, SCOOT.
The models are also being used by TfL to support the design of the Cycle Superhighway routes across central London and assess their impact on traffic operations. TfL has integrated Vissim microsimulation output into high quality 3D visualisations.
Vladimir Vorotovic, Lead Modelling Specialist at TfL said: 'The great advantage of adopting a single, integrated, multi-level platform for simulation modelling is that we increase our efficiency and consistency, ensuring that Surface Transport offers a coordinated approach to scheme evaluation.
