奥纬咨询：2026年中东如何应对交通危机报告（英文版）

Traffic congestion occurs when the number of vehicles traveling on a road exceeds the capacity for which it was designed,1 causing bottlenecks and delays. In technical terms, congestion is measured using the road’s “level of service” — a scale from A (free-flowing) to F (severe congestion). Policymakers and planners typically aim to keep most roads operating within acceptable congestion thresholds, generally levels of service A to D.