Why is a 20mph speed limit being introduced?

Evidence shows that lower speeds result in fewer collisions and a reduced severity of injuries.

Frequently asked questions

Why is a 20mph speed limit being introduced?

Evidence shows that lower speeds result in fewer collisions and a reduced severity of injuries.
Pedestrians are five times more likely to be killed if hit by a vehicle driven at 30mph 
compared to 20mph.

As well as the safety benefits, 20mph zones improve air quality, reduce noise pollution and 
can result in healthier lifestyles by encouraging more walking and cycling in communities. 
Roads will be safer and shared more equally between different road users.

Who made the decision?

The Welsh Government passed a law in 2022 to introduce 20mph as the default speed limit. 
Councils have not made the decision and cannot change the decision, but they are 
implementing the changes by amending existing signage and introducing new signage.

You can find out more about the reasons behind the Welsh Government 20mph law at their 
website here: Introducing 20mph speed limits: frequently asked questions

When do the changes start?

The Welsh Government says that the changeover from 30mph to 20mph will take place on 17 
September, 2023.

What do I need to do?

You can participate in the consultation on the proposed exemptions in Swansea to the 20mph 
limit. Please see the next FAQ for more information.

When the rules come in, you will need to observe the new speed limits.

Where will the exceptions to the 20mph limit be in Swansea?

There are a number of roads in Swansea that are currently set to a speed limit of 30mph 
which are intended to remain at that limit after September 17. Among them are 30mph 

sections of arterial roads like Fabian Way, Oystermouth Road and Carmarthen Road.

Details of the roads proposed to remain at 30mph throughout Wales can be viewed on the 
link - https://datamap.gov.wales/maps/roads-affected-by-changes-to-the-speed-limit-on-re/view#/

Draft traffic regulation orders (TROs) naming roads in Swansea which could be potentially 
exempt from the 20mph regulations have been published for public consultation. Residents, 
businesses and other organisations can see the information at this link: 
Traffic Regulation Order search - Swansea

Comments on the proposals should be directed to The Chief Legal Officer Civic Centre 
Oystermouth Road Swansea SA1 3SN or via E-mail at legal.trafficnotices@swansea.gov.uk
before the closing date on 26 July 2023.

You can find out more about the rules set out by the Welsh Government about exceptions 
which councils in Wales can apply to maintain 30mph roads at their current limit at this link: 
Setting local speed limits | GOV.WALES

I already live in a 20mph area. Will that change?

No. If you already live in one of these areas like Sandfields, nothing will change after 
September 17.

Who is paying for the changes? Is it coming from my council tax?

In Swansea the cost of implementing the change is expected to be in the region of £3m. The 
Welsh Government has stated it will fully-fund the work in Swansea, so none of the cost will 
come from the council tax. It is important to note that the grant for this work is ring-fenced 
for implementing the Welsh Government’s 20mph law. It cannot be spent on any other road 
projects or activity.

Is there more information on the 20mph rules?

Yes, the Welsh Government has a web page here, which it will update from time to time 
between now and September 2023: Introducing 20mph speed limits: Introducing 20mph speed limits: frequently asked questions | GOV.WALES

Who will be responsible for enforcement of the new 20mph rules?
As with all speed enforcement issues, Go Safe Wales will be responsible for enforcing the 

As always, any money generated from the proceeds of fines or prosecutions goes to the 
Treasury. None of the proceeds of speeding fines goes to Swansea Council or any other local 
You can find out more about Go Safe's work - GoSafe | Wales Road Casualty Reduction Partnership