Go up to 50,000 if it's Manhattan density.

Why not make cars that do not collide?

Now we've reached the subject of public transport, and public transport here in Dublin is a somewhat touchy subject.

lots of roads dispersed over large areas, almost no public transportation.

So she ran away from home. And then went astray.

There is no changing directions now, people need you!

The public transportation system runs like clockwork.

In fact, that's exactly what they're promising us.

I mean, you have the typical European cities, with a dense urban core, good public transportation mostly, not a lot of road capacity.

Right. So what has changed?

Hey, you can't bring those here on a public vehicle.

Of course, what you don't know is that the two stations are only about a hundred meters apart.

lots of different measures dense cities or dispersed cities,

This hotel is conveniently located in terms of public transportation.

And we come from a long tradition of sharing.

Once you do those things, you can start making all sorts of investments.

(Laughter)

It's like saying, screw the public transport system.

Traffic is a major urban problem.

Of course you can't separate this out from issues like social diversity, mass transit, the ability to be able to walk a convenient distance, the quality of civic spaces.

If we can understand this, then maybe we can figure out how people can be so happy with this.

The transportation system in that city is quite good.

Our city's transport problems are minor when measured against capitals like London and New York.

But you see that happening on the High Line, and I think that's the power that public space can have to transform how people experience their city and interact with each other.

What form of transport will we take?

Transportation hubs are prepped and set.

But in the end, the main thing we need to focus on are people.

I don't think there is anywhere in Hangzhou you could stand for more than a minute or two where you wouldn't have a Hangzhou public bike go past you.

This one in Seattle is on the site of a mall parking lot adjacent to a new transit stop.

So moving to our second commandment that I wanted to show you.

And if you look at California, they use 2,500 buses.

So, for example, city departments can open up transit data.

Ethanol new ways of making ethanol.

They lack even the most basic amenities.

And this is where we have more density it's where we have more public transport.

Instead, these people had to walk, bike, take the train, or other forms of public transport.

Mr. mayor, you were elected in a campaign to clean up the city.

Automated real time traffic information exchange.

And if you have to travel some distance farther than you can do under your own power, there's accessible vehicles, and if you can't afford one of those, there's accessible public transportation.

It will then tell you how long the commute on your usual route is going to be, and it will give you a faster route if there's a lot of traffic.

At that time, 35 millimeter nitrate film was so flammable that you couldn't even bring a reel onto a streetcar.

The substance of things unseen.

The barter of goods, services and knowledge too is part of this another economy.

It's easy to ride a bike for sightseeing around West Lake.

There are also simulators for phenomena that are not based on physics.