Smart City and Intelligent Vehicle Synergy

Synergy between smart cities and intelligent vehicles, widely known as "Dual-Smart" synergy, is a systematic initiative that deeply integrates smart city infrastructure with intelligent connected vehicles (ICVs) to establish a unified "vehicle-road-cloud" collaborative ecosystem. Its underlying principle enables "smart vehicles" and "intelligent roads" to share data and coordinate actions under the orchestration of a "robust cloud platform", transitioning urban mobility from fragmented "human-vehicle-road" interactions into a hierarchically coordinated, integrated intelligent network.

Core Architecture and Operating Mechanism

The "Dual-Smart" synergy is anchored on a bidirectional closed-loop mechanism. On one hand, smart city infrastructure empowers ICVs: deploying sensing networks and mobile edge computing nodes—primarily integrated into multi-functional smart lampposts—delivers beyond-visual-range situational awareness and high-precision navigation, effectively eliminating blind spots inherent in stand-alone on-board vehicle sensors within complex urban environments. On the other hand, ICVs act as "mobile sensor nodes", relaying real-time trajectory and operational data back to the urban cloud platform to provide critical inputs for real-time traffic monitoring and adaptive traffic light optimisation.

This synergy relies on a multi-tiered "vehicle-road-cloud" integrated architecture, comprising three levels: the edge cloud (delivering local, millisecond-level real-time control), the regional cloud (managing cross-jurisdictional coordination), and the central cloud (handling big data analytics and long-term strategic optimisation). China pioneered and implemented this technical approach, which has now become the prevailing industry standard.

Functional Scenarios and Practical Roll-out

In October 2025, during the 2025 World Intelligent Connected Vehicles Conference, authorities unveiled the top ten functional scenarios for "vehicle-road-cloud integration". These include traffic light information feeds, traffic incident alerts, cooperative vulnerable road user (VRU) collision avoidance, cooperative autonomous emergency collision avoidance, cooperative ramp merging and diverging, traffic management feeds, priority vehicle alerts, shared sensor data services, cooperative smart parking guidance, and vehicle platooning. These use cases are set to facilitate the commercialisation of eight key application systems, spanning smart public transit, autonomous delivery, smart mobility services, urban logistics, and automated municipal sanitation.

Take "cooperative vehicle merging and diverging" as an example: where speed disparities on highway on-ramps/off-ramps and restricted driver sightlines pose significant risks, "vehicle-road-cloud" tech feeds surrounding vehicles' live positions and speeds directly to the on-board system to chart the safest merging trajectory, substantially improving road safety and traffic flow.

Policy Support and Pilot Deployments

In October 2025, nine government ministries, including the Ministry of Housing and Urban-Rural Development, rolled out a joint action plan to accelerate "Dual-Smart" synergy. Aligned with "vehicle-road-cloud integration" pilot projects, the framework pushes for the construction of intelligent sensing systems and city-level cloud platforms, mainly leveraging multi-functional smart lampposts.

Earlier in 2024, five ministries, led by the Ministry of Industry and Information Technology, launched an ICV "vehicle-road-cloud integration" pilot programme across 20 shortlisted pilot cities and consortia. To date, China has opened over 35,000 km of dedicated public test and demonstration routes, installed more than 11,000 sets of intelligent roadside units (RSUs), and logged over 120 million km of cumulative autonomous testing. Guangzhou has rolled out an expansive cross-district testing network with total test mileage hitting 24.41 million km, becoming China's first city to see V2X on-board unit (OBU) fitments surpass 10,000 vehicles.

On the regional front, Guangdong has mandated the comprehensive roll-out of "vehicle-road-cloud integration" pilot schemes in key areas by the end of 2027; Chongqing has established a 30TB high-value data repository, enabling real-time traffic simulation and automated incident detection.

Global Benchmarking and Industry Outlook

Approaches to "Dual-Smart" synergy vary across international markets. The US has historically leaned towards stand-alone vehicle autonomy, though it is now accelerating its transition to C-V2X protocols; the EU prioritises cross-border interoperability and rigorous data privacy governance through initiatives like C-Roads; Japan and South Korea rely heavily on centralised legislative frameworks and high-definition mapping integration; whereas China champions a top-down masterplan, deploying massive pilot city clusters to spearhead 5G-V2X connectivity and standardised roadside infrastructure. Driven by municipal-scale testbeds, this "China Blueprint" has created a virtuous cycle where "standards enable pilot roll-outs, and real-world trials refine future standards"—shifting the momentum from pure scale to global technology leadership.