We had the privilege to participate on the project in Bahria Town in Karachi of Pakistan. End User(BT) requested a traffic actuated solution to very complicated intersection where it is needed 32 groups of traffic signals to control the traffic flow. Sinowatcher and JARI engineering team designed a solution where traffic signal controller with self-adaptive system and wireless vehicle detection system were employed. The client demanded also customized pedestrian request system so our controller engineer had to adjust the software in order to meet such requirement.
Traffic actuated system is a kind of control mode that can be measured by vehicle detector so that signal display time can be changed with the measured traffic arrival situation.
Compared with the fixed time control (only following preset plans), by employing vehicle detectors the actuated system can fully utilize green time and therefore improve the traffic flow significantly.
Fully traffic actuated system logic with min.time and max.time:
G max: maximum green time
G min: minimum green time
G 0 : unit extension time
See below the intersection layout,signals and sensor location:
See below time sequence,in this project, 1cycle we have 4main stage,and 5 jump stage according the sensor,we provide a special pedestrian phase, anytime push the button
Traffic signal control system and wireless vehicle detection system working logic:
The client had an important and uneasy ITS project so we have provided on-site support which included our project manager and traffic signal control engineer.
Furthermore, we have provided instruction and training the engineering staff of our client to make sure that they are able to utilize our adaptive system completely.
Foto: training session at our client office
We were assisting our clients to install wireless vehicle detection installation (including sensor, router & receiver, data acquisition center)
Engineer has configured the setting of the release plan according to the relevant road condition.
During next two days we have spent checking the configuration of the controller and detect system to make sure it works without any issues.
Once the installation and testing procedure was completed then municipality and traffic police came to inspect the situation
Photo: Mayor of the municipality is being presented newly traffic actuated system.