highways england：2021年管理战略路网的交通延误报告（英文版）

Since 2015, we have helped customers make safer and more reliable journeys on our 4,300 miles of motorways and major A-roads. Everything we do, from designing our roads to clearing incidents, helps keep traffic moving on our network 24 hours a day, 365 days a year. We know that our customers’ experiences vary when it comes to journey times, and that delays, especially when unexpected, can affect day-to-day lives. Delays on our network impact the economy, costing around £3 billion per yea