联合王国的一项调查显示,尽管有证据表明安全情况有所改善,但大多数成年人反对将速度限制降低至20毫米。 A UK survey shows most adults oppose lowering speed limits to 20mph, despite evidence of improved safety.

对1 000名英国成年人的2026年2月调查发现,66%反对将30厘米道路降低到20厘米,67%反对将20厘米限制降低到20厘米,尽管政府努力到2035年将道路死亡人数和重伤人数减少65%。 A February 2026 survey of 1,000 UK adults found 66% oppose lowering 30mph roads to 20mph, with 67% calling 20mph limits too slow, despite government efforts to cut road deaths and serious injuries by 65% by 2035. 威尔士领导了这一转变,设定了20厘米的默认限值,表明第一年严重受伤人数减少约100人,英格兰、苏格兰、伦敦和西北部分地区正在采取类似措施。 Wales has led the shift with a default 20mph limit, showing about 100 fewer serious injuries in its first year, while parts of England, Scotland, London, and the North West are adopting similar measures. 证据表明,即使平均速度下降1厘米,也能将坠机率降低5%,但公众对于旅行时间和实用性仍持怀疑态度。 Evidence suggests even a 1mph average speed reduction can lower crash rates by 5%, but public skepticism remains over journey times and practicality. 地方当局在设定限额时平衡安全、交通流量和公众舆论,敦促司机遵循标志,以避免罚款、罚款点数和较高的保险费用。 Local authorities balance safety, traffic flow, and public opinion when setting limits, and drivers are urged to follow signage to avoid fines, penalty points, and higher insurance costs.