New Delhi: Researchers at the Indian Institute of Technology (IIT) Madras have developed a possible solution to traffic snarls on Indian roads through the use of a probe-based approach for real-time “re-timing” of traffic signals.
According to officials, this is probably the first time a probe-based, demand-responsive signal control has been developed for Indian conditions.
The researchers conducted a study in which travel-time data from four sample-probe vehicles were used to calculate “Green” and “Red” timings for each signal cycle.
A signal cycle is the time between one ‘green’ signal to the next ‘green’ signal or one ‘red’ signal to the next ‘red’ signal for a selected movement.
“While a lot of time, effort and money have been spent on experimenting with ‘off-the-shelf’ traffic-responsive signalling software from abroad, these have not worked well in Indian traffic conditions, since their implementation required a number of sensors and large traffic stream data, which was not easy to collect,” said Lelitha Vanajakshi, Ministry of Road Transport and Highways (MoRTH) Chair Professor at IIT Madras.
“Moreover, these software were rarely flexible for incorporating Indian traffic characteristics in their algorithms, resulting in excessive queues and delays at the intersection, in spite of large capital investments,” Vanajakshi added.
The findings have been published in the International Journal of Transportation Research.
“The traffic composition in India is very different from that in the Western countries. In India, the traffic is usually referred to as belonging to the category of mixed traffic conditions, with a variety of vehicle classes juxtaposed with lane-free movement.
“Therefore, in this study, the effect of composition has been included in the algorithms, which makes it versatile for use across different cities with varying vehicle compositions,” said Bhargava Rama Chilukuri, Faculty, Department of Civil Engineering, IIT Madras.
In the study, the researchers have used travel-time data — which is invariant to the vehicle class — instead of the traditional input, which is traffic flow. This makes the algorithms easy to implement with a variety of probe-based data sources such as Bluetooth, Wi-Fi, and radio frequency identification scanners.
Over the past four years, EastMojo revolutionised the coverage of Northeast India through our sharp, impactful, and unbiased overage. And we are not saying this: you, our readers, say so about us. Thanks to you, we have become Northeast India’s largest, independent, multimedia digital news platform.
Now, we need your help to sustain what you started.
We are fiercely protective of our ‘independent’ status and would like to remain so: it helps us provide quality journalism free from biases and agendas. From travelling to the remotest regions to cover various issues to paying local reporters honest wages to encourage them, we spend our money on where it matters.
Now, we seek your support in remaining truly independent, unbiased, and objective. We want to show the world that it is possible to cover issues that matter to the people without asking for corporate and/or government support. We can do it without them; we cannot do it without you.
Support independent journalism, subscribe to EastMojo.
“Another advantage is that these data sources are low-cost, efficient, and can collect travel information of large samples of vehicles for traffic-control applications. We formulated a mathematical optimization problem that uses the sample travel-time data to compute optimal ‘green’ and ‘red’ durations, such that the varying traffic demand is met, while ensuring minimal queues and delays.
“This algorithm can also be extended to over-saturated intersections and optimum signal coordination across a series of intersections, which present themselves as areas of future research,” Chilukuri said.
Also read | MoS Meenakshi Lekhi bats for more investment in Mizoram
- Meghalaya: How the ‘abode of clouds’ ran out of water
- Union Cabinet condoles loss of lives in Manipur violence, Odisha rail accident
- Homicide: 2nd autopsy done on body of of IIT Kharagpur student from Assam
- Manipur: Magistrates join military combing ops for first time in 43 yrs
- Body of BSF constable killed in Manipur violence reaches Bengal
- Manipuris in South Korea write to Indian Embassy over crisis in state