Roozbeh Mohammadi

Aalto University · Department of Built Environment

Transit signal priority (TSP) is a traffic control strategy aiming at prioritising public transit vehicles at signalised intersections. The emergence of connected vehicles (CVs) provides the opportunity to enhance TSP operation, mitigating challenges such as the negative impact on nontransit users and the management of conflicting priority requests...

Considering recent advances in connected vehicle technology, we propose and assess two user-based transit signal priority (TSP) strategies. The first proposed strategy is designed to minimize the total user delay of a signalized intersection, while, in the second, we account also for minimis-i ng bus schedule delay. Besides the traffic flow indicat...

Modern higher education needs to provide skills needed in working life, such as entrepreneurship, besides the more traditional technological competence. The Boost I&E Project2 was developed in 2020 and 2021 with the aim of generating a set of guidelines for innovation and entrepreneurship challenge-driven projects for master's programmes. The added...

For many decades, urban traffic management systems have been vehicle-dominated. That is not only because of a lack of attention to users, but conventional data collection tools are powerless to collect individual vehicle data as well as vehicle users data. Connected vehicles (CV), as an emerging technology, can collect and transmit real-time vehicl...

Connected vehicles (CVs) have the potential to collect and share information that, if appropriately processed, can be employed for advanced traffic control strategies, rendering infrastructure-based sensing obsolete.However, before we reach a fully connected environment, where all vehicles are CVs, we have to deal with the challenge of incomplete d...

Queue profile is a crucial measure for traffic management in the vicinity of signalized intersections. In this study, we develop a method to identify queue profile using high resolution data, which can be provided from various sources such as drones. Our methodology has three main components which are signal state estimation, queue profile identifi...

Connected vehicles (CVs) present a great opportunity to smooth and improve traffic flows at intersections thanks to their communication capabilities, which may allow a real-time flow of information with the controllers operating traffic signals. Therefore, it is reasonable to envision that, in the near future, CV data may complement or replace spot...

Connected vehicle (CV) technology is expected to bring additional opportunities to share, collect, and exploit various information on vehicles and their occupants. Assuming that CVs are able to transmit on‐board users and vehicle data, a user‐based signal timing optimisation (UBSTO) strategy is proposed, designed to optimise user throughput for sig...

Connected vehicle (CV) technology is expected to bring unprecedented opportunities to share, collect, and exploit various information on vehicles and their occupants. This capability can be exploited to develop novel traffic management strategies, replacing or complementing the current dominant strategies, which have been mainly designed to facilit...

Transit signal priority (TSP) is a common strategy to improve bus right-of-way at signalized intersections. However, TSP systems have several challenges, such as negative externalities for non-transit users, and handling conflicting priority requests. Considering recent advances in connected vehicle technology, we propose a user-based signal priori...

In spite of several envisioned advantages of Connected Vehicles (CV) for urban traffic control, considerable investment and time are needed before all vehicles are equipped with connection technology. Recently, some methods have been proposed to compensate for the lack of data in the case of low penetration rate of CVs, aiming, for example, at esti...

Development of connected vehicles has provided different opportunities for traffic management based on high-resolution data. However, dominant methods are focused on vehicle-based strategies. The aim of this research is the development of a user-based signal timing (UST) strategy aiming at maximizing user throughput in a connected vehicle environme...

In populated cities with high traffic congestion, traffic information may play a key role in choosing the fastest route between origins and destinations, thus saving travel time. Several research studies investigated the effect of traffic information on travel time. However, little attention has been given to the effect of traffic information on tr...