An integrated real time transit signal priority control for high frequency transit services
Bus bunching affects transit operations by increasing passenger waiting times and its variability. In order to tackle this phenomenon a wide range of control strategies have been proposed. However, none of them have considered together both station and interstation control. In this study we tackle this problem aiming to determine the optimal vehicle control strategy for the various stops and traffic lights in a single service transit corridor that will minimize the total time users must devote to making a trip taking into account delays for both transit and general traffic users. Based on a high frequency capacity constrained and unscheduled service (no timetable) were real time information about bus position (GPS) and bus load (APC) is available, this study focuses, on strategies for traffic signal priority in the form of green extension, considered together with holding buses at stops and limiting passenger boarding at stops. The decisions regarding transit signal priority are taken based on a rolling horizon scheme where effects over the whole corridor are considered in every single decision. The proposed strategy is evaluated in a simulation environment under different operational conditions. Results shows that the proposed control achieve excess delay reductions for transit users close to a 61.4% compared to no control while general traffic only increases a 1.5%.
Event Wrap-Up: 1st Forum for Sustainable Transportation Technologies
Source: EMBARQ
EMBARQ Brasil presents on environmental benefits of bus rapid transit.
Brazilian BRT systems can significantly reduce carbon emissions and generate other important co-benefits, said EMBARQ Brasil President Toni Lindau at the 1st Forum for Sustainable Transportation Technologies in Rio de Janeiro. He also pointed out the need to evaluate the potential of alternative vehicle technologies and fuels using a life cycle analysis.
EMBARQ Brasil was invited to participate in the event by FETRANSPOR, the state federation of bus operators in Rio de Janeiro. This invitation was the result of the partnership between EMBARQ Brasil and FETRANSPOR initiated at the BRT Marketing Workshop held in May.
The forum was an important gathering of transport officials and members of the private sector, including the largest bus manufacturers and fuel providers. The forum focused on how to provide alternative energy sources for improved transportation systems, especially during the 2014 World Cup and 2016 Summer Olympics. Transport officials from across Brazil were exposed to the need to carefully consider vehicle and fuel choices in projects for both mega-events.
EMBARQ Brasil, together with EMBARQ Research and Practice, is now developing a holistic and detailed comparative study of alternative vehicle and fuel technologies, to help support the selection of technologies for the next generation of Brazilian BRT systems.
The forum was organized by FETRANSPOR and O Globo Jornal, with the support of EMBARQ Brasil. EMBARQ Brasil President Toni Lindau was a key speaker. Director of Development and Strategic Relations Rejane Fernandes and Transport Engineer Magdala Arioli also represented EMBARQ Brasil at the event.
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