Microscopic energy consumption modelling of electric buses: model development, calibration, and validation

in Transportation Research. Part D, Transport and Environment (2021)

Sensitivity Analysis on Regularity Based Driver Advisory Systems

in 2020 IEEE 23rd International Conference on Intelligent Transportation Systems (ITSC) (2020, December)

Enhancing Bus Holding Control Using Cooperative ITS

in IEEE Transactions on Intelligent Transportation Systems (2020), 21(4), 1767-1778

A real time hybrid controller for regulating bus operations and reducing stops at signals

Scientific Conference (2019, June)

We propose a hybrid controller which consists of holding and a Driver Advisory System (DAS). It combines the objectives of seeking the regularization of operation and the reduction of stop and go actions ... [more ▼]

We propose a hybrid controller which consists of holding and a Driver Advisory System (DAS). It combines the objectives of seeking the regularization of operation and the reduction of stop and go actions at signalized intersections. A simple headway based holding criterion is applied at stops to define the time needed to maintain even spaced headways between buses and additionally a speed recommendation is given to traverse during green indication at the downstream signalized intersection. The controller is tested using simulation for a bus line of the city of Luxembourg, Luxembourg and compared to a benchmark scenario, the single application of bus holding, two advisory systems and different levels of transit signal priority. Results show that there are additional benefits compared to traditional holding in terms of regularity while similar performance to strong transit signal priority is achieved in terms of time spent at traffic lights. [less ▲]

Towards Optimised Deployment of Electric Bus Systems with On-Route Charging using Cooperative ITS

Scientific Conference (2018, July)

Novel C-ITS support for Electric Buses with Opportunity Charging

in Proceedings of IEEE-ITS Conference (2017)

A Survey of Cooperative ITS for Next Generation Public Transport Systems

in Intelligent Transportation Systems (ITSC), 2016 IEEE 19th International Conference on (2016, November)

Robust control strategy for minimising energy consumption of electric buses using cooperative ITS technology

Scientific Conference (2016)

Mitigating flash crowd effect using connected vehicle technology

in Vehicular Communications (2015), 2(4),

A Flash Crowd Effect (FCE) occurs when in the case of non-recurring congestion a large portion of drivers follows similar re-routing advice. Consequently, congestion is transferred from one road to ... [more ▼]

A Flash Crowd Effect (FCE) occurs when in the case of non-recurring congestion a large portion of drivers follows similar re-routing advice. Consequently, congestion is transferred from one road to another. Coping with the FCE is challenging, especially if the congestion results from a temporary loss of capacity (e.g. due to a traffic incident). The existing route guidance systems do not address FCE, as they either do not consider the effects of guidance on the rest of the road network, or predict link travel times based on the number of vehicles travelling on the link, which in the case of the loss of capacity is unreliable. We demonstrate that the FCE can be addressed in a distributed way with Vehicle-to-Vehicle (V2V) communication provided by Connected Vehicle (CV) technology. The proposed in-vehicle TrafficEQ system provides vehicles with mixed route guidance strategy—i.e. a route is autonomously chosen by the vehicle with a probability that is inversely proportional to the latest reported travel time on the route. Real-time travel time information is crowd-sourced by TrafficEQ users. Using realistic simulations of incident-related capacity drops on a classic two-route highway example and a realistic urban road network, we demonstrate that TrafficEQ can address the FCE by reducing travel time oscillations among the alternative routes. The system's drawbacks—in particular the occasional necessity of providing incentives to follow the guidance—are discussed. [less ▲]

Generation of Realistic Mobility for VANETs Using Genetic Algorithms

in Proceedings of the IEEE Congress on Evolutionary Computation (2012)