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In the short term if all the cars on a motorway are doing a constant speed and have more people in them on average you have just massively upgraded the trunk road network. The more longer term question is if all the cars are autonomous what should the speed limit be, UK motorways have a design...

But if we want to price in the negative externalities we have to price in the positive externalities as well, given that roads do 85% of passenger miles the positive externalities pretty much always dwarf the negative which is why building roads is relatively easy to justify from an economic...

That's a technicality, in practice motoring is subjected to a whole load of additional taxes which other forms of transport or general activities are not. Thus in practice the cost of motoring is more than representative of the cost to deliver the service. The only reason why road tax (now VED)...

You can find an academic who will write any old crap, analysis here are mostly constrained by assumptions that a battery power plane must be used and designed like a kerosene powered one. The Eviation Alice can fly at 260Kn with a 250nm useful operating range. Notably 50% of its range is...

Auto Merge put two unrelated posted together. eVTOL will likely be a multi hundred billion per year industry with 30-40 years. The tunnel to the channel islands was quoted at £5.6 billion.

Okaaaayyyy. Battery electric planes are flying already and have ranges of hundreds of miles. Battery energy density is already good enough to do useful flights and quick charging and battery lifetimes are increasing at a much greater rate than battery energy density. These are actually more...

I would have though that the solution to this "issue" would be for the drivers to be located in a central command center where they can control the train by telepresence. The fact that Starlink exists should mean that not spots in anything other than a tunnel are a thing of the past and...

I think this potentially how you do it. Use Barcelona Line 9 type solutions with a 12m single bore tunnel with both tracks and the platforms in it. Platforms can then be arbitrarily long. Line 9 is 47km long with 50 stations all in tunnels for about 8.4 billion Euros . This suggests that this...

If we are referring back to the Centre for cities stuff that used conurbation data so administrative boundaries wouldn't matter.

I used to live in a 3 story town house (modern), the fire protection is no different to a regular 2 story house, specifically a regular door between the kitchen and staircase and a door which doesn't have a lock on the inside as the main escape route. 4 story duplex townhouses would not get any...

The civil service re-location argument misses the woods for the trees. Rather than ship people out, ship the competency out to lower tiers of government. We have one of if not the most centralised states in the world. Plenty of the city regions on England have bigger populations than Scotland...

This is an M4 (To an American) This is a Sherman (To a British person) We have a long history of naming things, just because they use numbers abroad doesn't mean we should. In this case the American's adopted the British names and practices.

Ok, forgive the brevity inherent with an internet forum post. When I say ring fenced for capital spend what I would mean is that a council can't take windfall cash an use it to spend on basic services which should be funded from other means. It would be reasonable for example to spend it on...

The bribery isn't directly for the people, its for the mayor and the council! In general both sides would like to get their hands on that much money so it may not be quite the massive partisan issue either. £15 billion is a massive amount of money in council budget terms particularly if it is...

This has nothing to do with 15 minute cities. The analysis is looking at agglomeration economics, this is a property of how many people can interact and essentially means that large cities and city regions can have more specialisation and economies of scale and thus higher productivity. E.g. if...

This, with a lot of things people have an idea of what they would prefer but its often different when they try alternatives. As a social species many things are actually better when done as a group. Personally I have felt a lot more isolated since moving to a single family home in a newbuild...

Depends on how many houses and what degree of social capital the residents have. I'm thinking more like the private gardens that might be shared by a group of 20 or less houses where the back garden would be. You'd have to set up a home owners association with fees and similar which could decide...

My argument with new towns isn't the principle but the capacity. The final 5 (larger) new towns added housing for less than half a million people over a 50 year period, and the with the exception of Milton Keynes probably about 25% of that growth would have happened anyway. If you build on land...

I think the point would be that we need to give lower levels of government greater levels of tax and borrowing capabilities. If the council was able to profit from development and spend those funds on transport it would be a method for building stuff out without reference to Treasury or the...

There are plenty of places in the UK which are both dense, pleasant to live in and full of families. They also tend to be the most expensive places to live in cities like London. We don't have to build tower blocks or terraces. Mansion blocks or towns houses with shared gardens and liberal...