The page also claimed the default 20mph speed limit in Wales came at a “£9bn cost to the Welsh economy”.
The change to 20mph cost £34m to implement and has seen a reduction in casualties on Welsh roads, but has not been universally popular.
The £9bn figure appears to be an upper estimate of the policy’s cost to the economy over the course of 30 years, made in a 2022 Welsh government document.
It concluded the increase in journey times could create an economic “disbenefit” of £6.4bn between 2023 and 2052 – with £8.9bn being a worst-case scenario.
But it estimated, when potential economic savings from improved road safety were also taken into account, the policy would cost £4.54bn over 30 years to the Welsh economy.
Savings on police, ambulance and medical costs, the report said, will outweigh the direct cost of implementing the policy (the £34m spent in 2023).
The truth is, we do not know exactly what the longer-term costs or benefits will be, but it is inaccurate to say outright that the policy has cost, or is projected to cost, £9bn.
Doge Wales has been approached for comment.