NationThailand-June 12
At the Bangkok City Hall (Sao Chingcha), Governor of Bangkok, Chadchart Sittipunt, chaired the 6th meeting of Bangkok’s executive officials, where one of the key highlights was the successful implementation of the adaptive traffic signal system. The meeting revealed that the city had completed the installation and activation of intelligent traffic signal systems (Adaptive Signal Control) across 72 key intersections since March 2025. These improvements focus on major road junctions in the central areas, which have long experienced significant traffic congestion. The new system has led to a reduction in travel delays at these intersections by an average of 10-41%, marking an important step in using technology to address traffic congestion sustainably. Currently, Bangkok has around 500 traffic intersections, most of which still use the “manual system” or “Fix Time” system. This involves setting fixed green and red light durations based on a pre-programmed schedule, or having police officers manually control the lights based on the traffic conditions they observe. However, this system has several limitations, such as: although countdown signals are visible, indicating fixed timing, it is common to see a clear lane on the green light side, while the red light side has a traffic jam, causing unnecessary delays and wasted resources.Even when police officers control the signals, while they can adjust based on the situation, they cannot see the full traffic flow at the intersection, which may result in suboptimal decisions.
However, the Adaptive Signal Control system, now being used in Bangkok, works quite differently. It operates on the following principles:
Traffic Volume Detection (Image Processing Cameras): Instead of using traditional sensors, this system uses high-precision video cameras installed at intersections. These cameras act as “eyes,” continuously monitoring and processing the traffic flow in real-time for each lane. The data from the cameras is sent to a computer, which uses Artificial Intelligence (AI) and Algorithms to calculate and analyze the information. The system then decides the optimal timing for the traffic lights to maximize efficiency and minimize travel delays.
Read more at: https://www.nationthailand.com/thailand/bangkok/40051153
