ImFlow optimises traffic flows based on configured policies, making optimal use of the road infrastructure. The uniqueness of ImFlow is its real-time adaptive algorithm that automatically translates policy into optimal traffic flow. A set of policies represent a scenario. Within a scenario each policy is assigned a level of importance allowing the user to balance the importance of the traffic flows, priority vehicles, pedestrians and cyclists within the network. ImFlow supports multicriteria optimisation at area, route and intersection levels and allows policies to be defined for each level. ImFlow is an Intelligent Transport System that can interact with a scenario manager or strategy supervisor by means of scenarios. Where applicable the strategy supervisor can change the level of importance of individual policies providing even finer control over the traffic flows. ImFlow is highly flexible and scalable providing one solution from a single intersection to a large city network. As such, ImFlow is the tool to coordinate the traffic lights in a smart and sustainable city.

1. ImFlow:
Policy Based
Traffic
Management
Imtech Traffic & Infra - Head Office
Basicweg 16
NL-3821 BR Amersfoort
P.O. Box 2542
NL-3800 GB Amersfoort
The Netherlands
Tel. +31 33 454 17 77
Fax +31 33 454 17 40
www.imtech.eu/traffic-infra
The total solution provider www.imtech.eu/traffic-infra

2. ImFlow improves Flow, Safety & Environment ImFlow Technical Specification
■ mFlow reduces traffic congestion by accurately matching signal controller
I The table gives a summary of the ImFlow functions and capabilities.
operation to prevailing traffic conditions.
■ mFlow improves specific routes by prioritising the traffic flows.
I Modes of operation ■ Real-time adaptive control.
■ mFlow reduces the waiting time for pedestrians and cyclists.
I ■ System Activated Plan Selection (SAPS).
In control of your traffic flows. ■ mFlow improves public transport by minimising the delay and stops and
I ■ Fixed time control.
assists in the adherence to schedule (i.e. uniform arrival at passenger ■ Local control.
stops). Configuration and ■ The ImFlow configurator is fully integrated with a micro simulation environment to enable the
The smart and sustainable city ■ mFlow can inform pedestrians and cyclists about the remaining waiting
I testing traffic engineer to effectively configure and test an ImFlow system.
time, reducing red light negation. Multi criteria ■ Vehicles.
ImFlow will change the way we manage traffic. Effective and ■ mFlow can give conditional priority to vehicles equipped with co-operative
I optimisation ■ Pedestrians and cyclists.
environmentally transportation is the key to a city or region’s technology, promoting schemes like eco-driving for heavy trucks. ■ Public Transport vehicles.
economy and environment, making it a better place to live and ■ mFlow reduces traffic accidents resulting from impatient driving by
I ■ Priority vehicles (e.g. Eco driving trucks, emergency vehicles).
work. The city’s long-term strategy drives the policies, programs, making traffic flows smoother. Multi-level ■ The ‘network optimiser’ optimises the signal timings based on the provided policies and within the
design criteria, and projects that will further enhance the city ■ mFlow provides emergency vehicles with a quick and safe passage
I optimisation configured constraints. The ‘intersection optimiser’ further optimises individual controller timings
or region’s mobility. Through this plan the city will make its through the network providing absolute priority where applicable. using logic rules.
transportation system more environmentally, economically, and ■ mFlow saves energy by making traffic flows smoother, minimising stops
I Public Transport ■ User policies and performance indicators used to manage a PT-route.
socially sustainable. Transport planners and traffic engineers require and reducing travel time to destinations, thus allowing savings on fuel. (PT) priority ■ Modelling of the behaviour of PT-vehicles on PT-routes.
tools to implement the policies defined in the plan and to keep the ■ mFlow reduces traffic pollution (noise and emissions) by reducing the
I ■ Prediction of the arrival/departure at signalized intersections and passenger stops.
Intelligent Transport Systems up-to-date when demands or policies number of times vehicles have to stop. ■ Extensive recording of the journey of PT-vehicles.
are changing. Trade-offs are needed to make optimal use of the ■ y moving unavoidable congestion to another part of the road network
B ■ lexible detection concept (e.g. traffic light controller inputs, centre-to-centre interface).
F
available road infrastructure, traffic flows need to be identified and ImFlow can influence and optimise the location and the severity of traffic Hurry calls ■ Absolute priority for emergency vehicles.
prioritised and decisions made about the amount of traffic allowed pollution. By spreading the pollution ImFlow reduces the effect of traffic ■ VIP routes.
onto the network to reduce congestion during peak hours and to pollution on the urban environment. User interface ■ Multilingual web based user interface.
maximise the effectiveness of public transport. ImFlow is this tool Communication ■ ImFlow is fully based on internet technology.
for urban traffic management enabling the city's action plan to be ■ Support for both wired and wireless IP networks.
effectively implemented. From policy to flow
ImFlow offers a unique programming concept based on policies
Policy based Urban Traffic Management and constraints. The policies and constraints can be directly entered
into the ImFlow system and are used by the ImFlow adaptive
ImFlow optimises traffic flows based on configured policies, making algorithm to optimise the signal timings in real-time. The policies
optimal use of the road infrastructure. The uniqueness of ImFlow is and constraints are easily understandable by traffic engineers
its real-time adaptive algorithm that automatically translates policy who need to setup and maintain an ImFlow system where policies
into optimal traffic flow. A set of policies represent a scenario. Within represent the optimisation objectives and the constraints are rules Imtech/Peek believes its products have to contribute to a liveable and sustainable society. Imflow ensures better
a scenario each policy is assigned a level of importance allowing the that must be obeyed in order for the system to function safely. For traffic flow and less fuel consumption and fits within our policy for corporate social responsibility.
user to balance the importance of the traffic flows, priority vehicles, example, by defining a policy for a route a traffic engineer can make
pedestrians and cyclists within the network. ImFlow supports multi- the traffic on the route more important than other traffic flows.
criteria optimisation at area, route and intersection levels and Based on this setting ImFlow will minimise stops and delays on the
allows policies to be defined for each level. ImFlow is an Intelligent route to implement the policy. ImFlow tracks all priority vehicles on
Transport System that can interact with a scenario manager or the network and predicts their arrival and departure at signalised
strategy supervisor by means of scenarios. Where applicable the intersections and Public Transport stops. A priority vehicle receives
strategy supervisor can change the level of importance of individual conditional priority based on the configured policies and the current
policies providing even finer control over the traffic flows. ImFlow status of the vehicle.
is highly flexible and scalable providing one solution from a single
intersection to a large city network. As such, ImFlow is the tool to
coordinate the traffic lights in a smart and sustainable city.