Core Viewpoint - Shenzhen is implementing stricter traffic management measures for National III and IV emission standard diesel trucks, aiming to improve air quality and accelerate the elimination of older vehicles [2][4]. Group 1: Traffic Management Measures - Starting January 1, 2026, National III diesel trucks will be banned from operating citywide at all times. National IV diesel trucks will face phased restrictions based on vehicle type, time, and area [2]. - As of January 25, 2025, Shenzhen will already impose time-based restrictions on National III diesel trucks, with a further extension to 24-hour restrictions starting July 1, 2025 [2]. Group 2: Regional Coordination - Neighboring cities such as Dongguan, Guangzhou, Foshan, Jiangmen, and others will also implement all-day restrictions on National III diesel trucks starting January 1, 2026, indicating a regional effort to limit these vehicles [3]. Group 3: Subsidy for Vehicle Elimination - The subsidy application for the early elimination of National III diesel trucks is nearing its deadline, with eligible owners able to claim up to 20,000 yuan if they complete the vehicle scrapping by December 31, 2025 [4]. - The subsidy amounts vary by vehicle type: 9,000 yuan for light trucks, 12,000 yuan for medium trucks, and 20,000 yuan for heavy trucks [4].