20 is not always plenty, but sometimes it is!

This story appeared this evening on the BBC News website.
https://www.bbc.co.uk/news/uk-wales-68859568

Here’s my opinion, for what it’s worth. Feel free to disagree. This blog post is by no means a complete thesis on my opinion of how we should use roads, but the views I express are just that – opinions and not evidence.
The 20 mph policy has *some* sense (maybe even a great deal of sense) to it but has been really poorly explained and implemented, even now more than 6 months later. I agree that the speed limit in large parts of villages, towns and cities should be set at 20, but there are also many roads where it simply makes no sense. The policy is apparently aimed at reducing accidents, injuries and even deaths from road traffic accidents. I accept that overall there may be evidence to support the reduction from 30 to 20, but I also question whether that generalisation is applicable to every urban road as it seems unlikely that accident and collision rates on every such road could justify the reduction.
I agree 100% that the speed limit in residential areas should be 20. However, to pick an example near me, I would argue that while it seems sensible for a 20 speed limit on Lake Road West, it should be 30 on Wedal Road, 20 on Nant-Y-Wedal and 20 on Allensbank Road.
This is just one example to my mind of being smarter with a 20 limit.
City Centre – 20. Areas around schools – 20. Busy urban roads – 20, because you’re unlikely to do more anyway. Arterial roads into urban areas – at least 30.
All road users share the responsibilty for safety. Drivers need to be far more aware of other users such as pedestrians and cyclists. Cyclists need to be cognizant of other road users – I see far too many of them who ignore red lights and just cycle through them, even at pedestrian crossings. I also see them cycling on roads despite there being cycle lanes provided (even occasionally with dedicated cycle traffic lights)- daft! Only a few days ago, I saw no less than 10 cyclists on Allensbank Road not using the provided cycle lane in the space of waiting just a few minutes at the traffic lights at the junction of Wedal Road and Allensbank Road – why are these people so idiotic?
Pedestrians – get your eyes off your phones and your headphones off when you’re in an area when you may need to be aware of other road users.
Drivers – stop being utter morons! Obey the rules of the road and then maybe everyone can get to where they want to be without fear of getting crashed into or knocked over as a result of your stupid, selfish actions? Oh – and when using motorways and dual carriageways – don’t be a lane hog. If someone is overtaking you on the inside, they may be an arsehole, but maybe think if the arsehole is actually you and maybe move over to the left-hand lane? Also, think about where you park your car and how you park your car, whether on roadsides or in car parks. Don’t park in spaces designated for disabled people or for parents with young children if you’re not entitled to.
Overall, I think the policy has been poorly explained, poorly implemented and the amendment of road signs has been severely defective. It is extremely frustrating to be in a car travelling behind another vehicle travelling at 20 when the speed limit is clearly signposted as being 30 or more, simply because some drivers are seemingly incapable of reading road signs. This may be because the driver is worried that the limit is actually 20 but the signs haven’t been changed by the local council. While it’s been good for drivers to think about their speed and the adverse consequences of how they drive, the need for a far more nuanced approach to how certain roads are affected is desperately needed. We need transport policies to be smarter all round.