Your browser doesn't support the features required by impress.js, so you are presented with a simplified version of this presentation.

For the best experience please use the latest Chrome, Safari or Firefox browser.

Public transports analysis:
the CityChrone project.
Indaco Biazzo
Politecnico di Torino
SmartData@PoliTO - DISAT
personal page -- http://indacobiazzo.me/
citychrone -- www.citychrone.org
Motivations
Generic placeholder image

Overspecialization in Science

Very difficult to cross the branches of science.

Slow learning curve

Very difficult to perform self-education path

Motivations
Science & Research

Multidisciplinary approach

Needs of theoretical framework, instruments and data from various domains.

Complex theorethical and computational tools

Easy to use frameworks, reproducibility of results.

Motivations

I was born in Rome

I had a very difficult childhood

Rome public transports are
"not so good".
And how much compared to the other cities?


Where is the better served place in the city?
And in the world?

Urban Accessibility Measures

Huge scientific literature
The first definition more than 50 years ago.


Many definitions - low computations
Few attemps to compute it at large scale.


First goal:
to measure the urban accessibility at large scale
Open data

Public Transports Schedules (GTFS format) - transitfeeds


Street graph - OpenStreetMap


Populations data - Eurostat Population Grid, SEDAC


city data and boundary - measuringurban - oecd


Open Source

code generated: https://github.com/CityChrone

Boundaries and Tessellation
isochrones
First step towards an accessibility measure:
The larger isochrones are, the faster you move.
Velocity Score
Average velocity taking a random direction
proportional to the number of places reachable in a fixed amount of time

Paris Rome
... ... ...

interactive maps and more cities:
Sociality Score
Number of people is possible to reach in a typical day trip starting from a point.

Paris Rome
... ... ...

interactive maps and more cities:
City Velocity
Velocity Score per person
Inequality distribution of accessibilities
Exponential decay from the center of the city.
Exponential decay of the Velocity Score with the time distance from the center.

Why these patterns are observed in all cities?
Are these inequalities unavoidable?


Can be modified or optimized?
In which way?

I don't known.
CityChrone
Interactive platform

Now I know how much Rome public transports suck

What we have to do to reach Paris?

What are the best interventions given a budget?

Let's Play!
CityChrone
Interactive platform for exploring new scenario
Budget: 5 Bilion €
Name Scenario: Gram Author: Pietro
Useful Links

Interactive platform:

citychrone.org

Open Source and Open Data:

project.citychrone.org

Article:

theoretical results [arxiv]

Today presentation:

indacobiazzo.me

Sponsor:

SmartData@PoliTO



Use a spacebar or arrow keys to navigate.
Press 'P' to launch speaker console.