Traditional traffic systems have long suffered from issues such as poor device compatibility, unstable data transmission, and high failure rates under extreme weather conditions. This solution is tailored for urban traffic scenarios, leveraging industrial computers as the core computing carriers and integrating a full range of industrial IoT devices—including industrial 4G routers and IoT gateway devices—to build a highly reliable "cloud-edge-device" integrated traffic networking architecture. It enables end-to-end traffic data connectivity, second-level event response, and full lifecycle device management, while adapting to the complex outdoor operating environments of northern temperate zones, with high temperatures in summer and low temperatures in winter.
This solution employs industrial computers as the core computing hubs, with other devices flexibly adapted to different traffic points, forming a layered and collaborative networking architecture:
Industrial PC Core Applications: Fanless industrial PC are deployed at district and county traffic signal control stations and expressway tunnel control points, replacing traditional commercial industrial computers. They perform three core functions:
First, they serve as local edge decision centers for signal timing, accessing real-time intersection traffic flow data and dynamically generating "green wave" timing plans to achieve coordinated regional signaling on core arterial roads such as Quancheng Road and Jingshi Road.
Second, they undertake AI inference tasks for roadside cameras, recognizing events such as illegal parking, wrong-way driving, and pedestrian intrusions in real time, and generating local alerts without the need to transmit video back to the cloud.
Third, they act as local data cache nodes, preserving more than 72 hours of traffic flow data during temporary network interruptions to prevent critical data loss, adapting to network fluctuation scenarios in some mountainous urban sections.
Industrial 4G Router On-Demand Deployment: In areas where wired deployment is challenging, such as airport peripheries and the New and Old Conversion Pilot Zone, 5G industrial routers are used to establish wireless communication links, connecting to traffic guidance screens and temporary construction warning devices. This enables rapid networking within 1–2 days at only one-third the cost of traditional wired solutions, while also supporting dual-SIM backup to ensure uninterrupted communication during peak traffic hours.
IoT Gateway Device Point Coverage: IoT gateway devices are deployed at BRT bus stations and metro interchange hubs to access multi-source heterogeneous data including bus GPS, passenger flow statistics, and bike-sharing parking monitoring. After local data cleansing, the data is uploaded to the cloud, compressing cross-modal data fusion latency to within 20 ms and significantly improving the efficiency of bus priority signal triggering.
RS485 to Ethernet Converter Adaptation for Legacy Systems: For traditional signal controllers and older magnetic loop detectors still operating in some old urban districts, RS485 to Ethernet converters are used to convert RS485/232 interface data into network protocols, seamlessly integrating legacy equipment into the new system. This eliminates the need for large-scale hardware replacement, protects existing investments, and reduces retrofitting costs by over 40%.
Industrial Switch Link Carrying: Full-gigabit industrial switches are deployed in core urban interchanges and tunnel equipment rooms, featuring ring network redundancy design with single-link fault self-healing time of less than 20 ms. This ensures stable transmission of high-definition surveillance and radar data, adapting to non-air-conditioned equipment room environments with high summer temperatures.
Cellular Modem Low-Power Coverage Supplement: Low-power cellular modems are deployed in remote southern mountain roads and scattered streetlight points, connecting to road icing monitoring and manhole cover displacement sensors. Leveraging narrowband IoT, they enable low-power long-distance data transmission, addressing the issue of insufficient traffic environment monitoring coverage in remote areas.
Full-link IPsec VPN encryption is adopted for transmission, with built-in firewall rules on all industrial devices to prevent illegal tampering with signal timing instructions. A unified device management platform is established to enable remote status monitoring, fault alerting, and OTA upgrades for all terminal devices, improving fault localization efficiency by 80% and reducing on-site O&M workload by 60%.
In response to extreme weather conditions typical of northern temperate zones—such as summer torrential rains and winter snowfall—all outdoor deployed devices are designed to operate within a wide temperature range of -40°C to 75°C and meet at least IP30 protection ratings, ensuring year-round system stability at the hardware level.
Following the implementation of this solution, the traffic efficiency of core urban arterial roads is expected to improve by over 25%, while the response time for traffic incident detection is projected to be reduced from an average of 15 minutes to less than 3 minutes. The cross-departmental traffic data sharing rate is anticipated to rise from below 40% to 90%. Moreover, the solution can seamlessly support subsequent integration with cooperative vehicle-infrastructure systems and digital twin traffic platforms, laying a solid hardware networking foundation for cities to build green and efficient smart transportation systems.
