WP4: Local Field Test
To strengthen, reinforce and partly demonstrate the developments of TRAMAN21, to increase its deployment prospects, but also, last not least, to enable sensible traffic flow improvements even under the current conditions, it was deemed crucial to include in the planned TRAMAN21 activities a local control system field test on a motorway that will deliver genuine operational evidence and preliminary realistic quantification of the benefits induced by the proposed control approach.
Task 4.1: Organisational Issues
To prepare for field test discussions, an appropriate text document, describing the background and motivation, the intended field trial, the proposed duties and responsibilities of both main field trial partners, i.e. of the responsible Road Authority and of the TRAMAN21 research group, has been prepared. The aim of the document is to serve as a proposal and basis for discussion with potentially interested Authorities.
During the start-up phase of the project, the PI contacted some potentially interested Road Authorities to identify a suitable motorway site for the field test. The motorway that has been selected is the M80 motorway in Melbourne, Australia. Organisational issues have been arranged with VicRoads, the corresponding Road Authority.
In addition, the project has also held intensive discussions with Highways England, the responsible Authority for motorways in England. An agreement has been reached for carrying out innovative control strategy development and simulation-based testing for a pilot motorway site; the possible subsequent field implementation remains an open option.
TRAMAN21 is also talking with some other potentially interested Road Authorities to possibly identify further suitable motorway sites for field testing.
Task 4.2: Design and Implementation
The field test at the M80 motorway in Melbourne, Australia, will address a major daily active bottleneck and will employ local controllers. Conventional VSL signs will be considered as an actuator because they are already available at the selected site and can be used as a surrogate of some VACS that are currently under development. Two controllers have been designed. The first one is an occupancy-threshold-based controller for VSL switching. The second one is a feedback control strategy, originally proposed for MTFC enabled via VSL, that has been extended considering multiple bottleneck locations. These controllers have been tested using a validated second-order macroscopic model.
Design work has also started for the control design and simulation-based investigations for the Highways England site. A generic integrated motorway traffic flow control concept has been developed. It is based on the combination and suitable extension of control algorithms and tools proposed or deployed in other studies, such as ramp metering or VSL-enabled cascade-feedback mainstream traffic flow control, and allows for consideration of multiple bottlenecks. The new controller enables coordination of ramp metering actions at a series of on-ramps; as well as integration with VSL control actions; towards a common control goal, which is bottleneck throughput maximisation. The approach enables a pre-specified (desired) balancing of the incurred delays upstream of the employed actuators, via a suitably designed knapsack algorithm. The control algorithm has been tested using real data from a pilot motorway site in England.
- Iordanidou, G. R., Papamichail, I., Roncoli, C., Papageorgiou, M.: A feedback-based approach for mainstream traffic flow control of multiple bottlenecks on motorways. 19th IFAC World Congress (IFAC'14), Cape Town, South Africa, August 24-29, 2014, pp. 11344-11349. -LINK-
- Iordanidou, G. R., Papamichail, I., Roncoli, C., Papageorgiou, M.: Feedback-based mainstream traffic flow control for multiple bottlenecks on Motorways. IEEE Transactions on Intelligent Transportation Systems, 2015, vol. 16(2), pp. 610-621. -LINK-
- Iordanidou, G.R., Roncoli, C., Papamichail, I., Papageorgiou, M.: Feedback-based integrated motorway traffic flow control with delay balancing. 14th IFAC Symposium on Control in Transportation Systems, Istanbul, Turkey, 18-20 May 2016, pp. 315-322.
Task 4.3: Demonstration and Evaluation
The field test implementation at the M80 motorway in Melbourne, Australia, is currently underway, while the demonstration and the evaluation of the developed strategies will follow.
Last updated on 14/12/2015.