To enhance road safety and reduce the occurrence of traffic accidents, a Traffic Accident Reduction Plan has been formulated. Through integrated approaches encompassing engineering, education, and enforcement, improvement strategies are continuously developed and implemented in response to the characteristics of traffic accidents within the city.
In addition, to reduce traffic weaving conflicts and improve turning movements through channelization, signal operations are reviewed and adjusted, including leading or lagging signal phases and split-phase operations. Left-turn lanes (including auxiliary left-turn lanes) are also installed at intersections, together with corresponding signal timing adjustments, to reduce conflicts between opposing through traffic and left-turning vehicles and to prevent left-turning vehicles from impeding following through traffic and causing congestion, thereby improving intersection safety and traffic flow. Empirical studies conducted both domestically and internationally have demonstrated that left-turn lanes can effectively mitigate angle collisions at signalized intersections, reducing accident rates by up to 55 percent. Installation was completed at 79 locations in the second half of 2025. At intersections with high pedestrian crossing volumes, including those near major transit stations and in commercial districts in the city center, pedestrian-exclusive signal phases and leading pedestrian intervals were implemented to enhance pedestrian safety. Protected left-turn signal phases were newly installed at 34 intersections in the second half of 2025. For existing roadway configurations with medians, where a left-turn lane must be installed in the inside lane, enhanced guidance through traffic signs and pavement markings—including extended taper sections and Lane Configuration Advance Warning Signs (Auxiliary Sign 1)—will be provided to reduce the likelihood of through vehicles inadvertently entering the left-turn lane. Where no median constraints exist, lane markings will be reconfigured using offset lane alignment.
