Yes that’s a neat way of stopping new cars from having a parking space. It’s not a solution to the problem of allowing new cars but only if they have a parking space.
there's a whole load of different ways you can achieve it. There are always two basic levers - cost and convenience.
Simply reducing the number of spaces increases the difficulty of finding a parking space, means you might have to park further from your home, decreases the convenience of car ownership which might nudge you into thinking its more hassle than it's worth (I remember reading years ago about places in posh west London with high car ownership where people said they were lucky to park within a couple of streets)
On cost you can increase the charge for permits (which looks like is in the kerbside strategy).
I've seen someone suggest that new residents shouldn't be able to apply for a parking permit (and there are already car free developments where residents can't).
You could set a limit on the number of permits and then reduce that number each year but some how you've got an allocate them. Again, market driven solution would be to auction them which would find the true 'value' - at some level people would judge costs of a personal car didn't outweigh the benefits and rentals/car share/public transport was enough for them. You'd probably need some trade permit scheme for people whose work genuinely justifies a motor vehicle (although again, price incentives might make some of them more likely to look at non-motorised alternatives. The local washing machine repair guy who has a VW camper van with full camper fit out internally as his 'works vehicle' comes to mind.
But what about journeys from London to elsewhere in circumstances where public transport isn’t an option (eg takes an incredibly long time, does not even reach the location and/or there’s too much stuff to carry on PT)? Even if a car is used a handful of times a year for inter city journeys, it needs to live somewhere the rest of the time.
Almost certainly doesn't make financial sense for those people to own a car. A friend of mine in Bristol was looking at buying a car so she could visit friends in other cities recently and it just didn't make sense vs renting for the amount she was going to use it.
Basic ownership costs - Servicing, tax, insurance at least £1000 (
Car ownership costs 2022). exclude fuel as thats the same whether you rent or own.
Lease costs (as a proxy for depreciation) - small engined smallish car, 48 month lease to keep it cheap. £263 per month = £3168 p.a. (
Seat Ibiza 1.0 TSI 110 Xcellence Lux MY23 Lease | Nationwide Vehicle Contracts)
So that's over £4200 a year.
Europcar 8 day rental (Saturday morning to Monday morning) for a Ford Focus (similar sized car) is £627 so 4 weeks of holidays spread over the year has only cost you £2500. That leaves you £1700 for weekends and odd zipcar trips at short notice.
Longer rentals are cheaper - it's only £1200 to rent that same car for a full month in one go.
People massively underestimate how much it costs to have a car sitting there doing nothing.