Tag: city

TransportationCamp: Real-Time Pedestrian and Bike Location, Session Two

March 26, 2011 / / 0 Comments

Real-Time Pedestrian and Bike Location How can we get it? What can we do with it? How can it not be creepy?
By Eric Fischer.

My summary of the discussion

There are many existing data sources that are published or have APIs that could stand as reasonable proxies for tracking people who are walking, biking, or just ambling around the city – some of this information is given away (via Foursquare) by those who are traveling, and other information is collected in real time (buses and taxis) and after the trip (travel surveys and Flickr photos). I don’t think the group agreed on any good use for this data (knowing where people are in the city right now), nor did the group come up with ways to ensure this collection is not “creepy.”

Eric’s original question involved the location of people bicycling, but the discussion spent more time talking about pedestrians. However, some techniques in tracking and data gathering could be applied to both modes.

See final paragraph for links on “further reading” that I find relevant to this discussion.

Schedule board at TransportationCamp West on Saturday in San Francisco at Public Works SF, 161 Erie Street.

[Ideas and statements are credited where I could keep track of who said what, and if I could see your name badge.]

Eric, starting us off:
We have a lot of information about where motor vehicles (MV) are in cities.
A lot of experience of city is not about being in a MV, though.

How many bikers going through intersection that are NOT getting hurt.
Finding places where people walk and where people’ don’t.

Where do people go on foot and on bikes?
As far as I know this isn’t available

Foursquare has benefits (awards) so people are willing to give the data, but we don’t want another Please Rob Me.

In SF, there are flash mobs, sudden protests, Critical Mass

Data sources:
-buses – boarding and deboarding – you can get a flow map from this. Someone said that Seattle has this data open.
-CTPP (Census Transportation Planning Package)
-city ped count
-Eric: Where people get on/off taxis.

“CycleTracks” – sampling bias, people with iPhones
-70% of handheld devices are feature phones, not smart phones. So there’s another sampling bias.

Opt-in factor
How do you sample?

SF Planning Dept. had a little program or project ask people to plot on a map your three most common walking routes.
What is your favorite street, and where do you not like to walk?

Eric: My collection tool is Flickr. Geotags and timestamps.
flickr.com/walkingsf

Magdalena Palugh: Are there incentives for commuting by bike? There are incentives for people who vanpool.
If there is incentive, I would gladly give up my data.
Michael Schwartz (SFCTA, sp?) What is difference <> SFCTA/MTA?

-If part of this is to get at where the trouble spots are, could you have people contribute where the good/bad parts are? “This overpass really sucks.”

Tom: Can you get peds from aerial images?
-Yes, but there’re too many limitations, like shade, and tree cover. Also, aerial images may be taken at wrong time (for a while the image of Market/Castro was during festival).

Brandon Martin-Anderson: What strategies have you tried so far?
-aerial images
-Flickr/Picasa location
-Street View face blur (a lot false positives)
Anything you plot looks kind of the same.

People like to walk where other people are. For safety reasons. -Good point on real-time basis.
Eric: Not a lobbying group for peds.
Eric: Find interesting places to go.
Richard: We need exposure data.

Paris bike sharing report showed that “Cycling is faster on Wednesdays.”
Europeans more open to sharing their private details – possibly because of stricter regulation on what agencies can do with the collected data. (There was a little disagreement on this, I personally heard the opposite).

Andrew: Can we use something like Xbox Kinect to track these people?

National Bike/Ped Documentation Project – same format
Seattle – 4 different groups that do annual bike counts. UW bike planning studio.

Who pays for this?
-Transportation planners pay for this.
-Private development projects (from contractor).
-Universities, NSF, Google
-Community groups –

Further reading

People

Mike Fleisher – DS Solutions
Andrew – @ondrae – urbanmapping.com

Notes to self

Is Census question about commuting about time or distance of “most traveled” mode?
Splunk – data analysis tool
What is difference <> SFCTA/SFMTA?

Witness appeal

July 3, 2010 / / 0 Comments

In London and Greater London (but not the City of London), when the Metropolitan Police want the public’s help in their investigations of incidents and crimes, including traffic collisions, they erect “Witness Appeal Signs” near the scene.

“We are appealing for witnesses.” Singapore also uses these signs.

It seems in 2009, though, the Metropolitan Police banned the use of the signs except for traffic collisions. Some research indicated that the public perceived that, due to the presence of the signs, crime in the neighborhood was increasing. The Daily Mail article quoted one officer to say:

“They were placed where the crimes actually happened, so were very much targeted at people who might have seen something. Now that source of information has been cut off…”

The signs are placed and designed in such a way to be seen by people walking, biking, and driving near the scene of the incident.

How effective is this small sign posted on a pole compared to a bright Witness Appeal Sign in London?

I suggest that American police departments, Chicago’s included, look into installing similar signs for the most severe traffic collisions, starting with a bilingual “witness appeal sign” for the hit & run crash in Pilsen that killed Martha Gonzalez.

Over-landscaped Asian parks

February 11, 2009 / / 0 Comments

BLDGBLOG’s post about “over-landscaped” parks in South Korea makes me think of my favorite “natural” space in Chicago, Ping Tom Park in Chinatown on the south branch of the Chicago River at 18th St.

The article discusses Korean photographer Hosang Park’s new photography work featuring these tight, semi-open spaces typically installed at high-rise apartment buildings.

The article talks about how the park’s amenities and features are so crammed together that the park is more a symbol of what a park can be. I was hoping Nicola or Park would address if there’s an inherent cultural style found in the park. That is, are they really over-landscaped, or do they resemble other artistic designs of East Asia.

Would we say that Korean Hangul characters are “over drawn” or have too many lines crammed into one character?

The Ping Tom Park in Chinatown has many similarities to the small parks featured in the blog post: They both have a strictly designed layout, as opposed to the free flowing shape and boundaries of American forest preserves; each features a pagoda; there is a lot of hardscaping using various materials of many colors to form the walkways.

A perception I take away from the article, Ping Tom Park, and the photos of the parks in Korea, is that the open space and green or grassy areas are available purely to watch and respect, but not to step on.

It seems the author’s opinion, which may be the same as the photographer’s, but that’s not clear, is that these parks are so perfect and manicured that we can’t appreciate them as much as more “natural” looking recreational spaces. However, the photographer, Park, unconsciously speaks to its benefits and why they continue to be constructed: “the trees, paths, and water features, no matter how artificial, push up property prices by providing an implicit guarantee of ‘the environmental benefits of a place where they belong.’ ”

I also wrote about two other Chicago parks, Jackson and Millenium, in November 2007.