Researchers Find Driverless Cars and Digital Twins Need More than 5G

Why It Matters

Reliable, low‑latency connectivity is essential for safe autonomous transport and for digital twins that support decarbonisation; signal disruptions could stall these emerging systems. The findings push policymakers and operators to redesign network architecture before large‑scale deployment.

Key Takeaways

• Traffic can cut 5G signal strength up to 20%
• Raising antennas to ~1 m eliminates most blockages
• Excessive roadside units may cause simultaneous link failures
• AI prediction could improve network resilience for autonomous systems
• 5G alone insufficient for reliable autonomous transport

Pulse Analysis

The rollout of 5G has been hailed as the backbone for intelligent transportation, promising ultra‑reliable low‑latency communication (URLLC) for connected and autonomous vehicles (CAVs) and their digital twins. However, the Glasgow‑Heriot‑Watt study shows that the physical environment—particularly moving vehicles and pedestrians—acts as a dynamic obstacle, attenuating signals enough to jeopardise real‑time data exchange. By simulating a typical two‑lane urban corridor, researchers quantified a 20% drop in signal strength under heavy traffic, a loss that could force CAVs to revert to slower 4G links and undermine safety‑critical functions.

Infrastructure planners must therefore move beyond the simplistic notion of “more antennas equals better coverage.” The research indicates that modestly elevating roadside units to roughly one metre clears most line‑of‑sight blockages, yet excessive height or density introduces new interference patterns and can even create simultaneous primary‑and‑backup link failures. Intelligent placement, combined with adaptive beamforming and real‑time monitoring, becomes crucial. Leveraging artificial intelligence to predict blockage events and dynamically re‑route traffic through alternative spectrum bands could maintain the seamless connectivity that autonomous systems demand.

Looking ahead, the limitations of 5G underscore the urgency for next‑generation solutions—6G, edge‑computing clusters, and hybrid terrestrial‑satellite networks—that can guarantee resilience under dense urban conditions. For governments and industry stakeholders focused on transport decarbonisation, integrating these advanced communication layers will be as vital as vehicle electrification itself. Proactive investment in resilient network design now will accelerate the safe, efficient rollout of driverless fleets and the digital twins that optimise routes, maintenance, and emissions across the UK's transport ecosystem.