Two more sections of trunk road in Wales are being studied for possible speed limit reductions to improve air quality, following major cuts in pollution where 50mph limits replaced 70mph in 2018.
The Welsh Government was the first in the UK to reduce trunk road speed limits to accelerate compliance with air quality regulations. The limit was reduced to 50mph on five sections of dual carriageway, including the M4 at Newport and Port Talbot. Compliance was initially poor, but installation of...
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