The emission mobilityscope: personalized data collection for agile urban planning

Optimizing the diamond lane: A more tractable carpool problem and algorithms

Blog Posts

The Right to not be Tracked II: in which I turn off the location permission for Google, but it tracks me anyway

K. Shankari blog 0 Comments

I recently published a post about the blurry boundaries between standard system services and Google Maps on Android. I argued that these boundaries made it hard to talk about consent and competition around location services. However, the branching factor for the data sharing made the argument complex and hard to follow. Even as I was writing that post, in the train on the way into Berkeley, I started getting notifications from the Google app about the weather at my location. The Google app (aka Google Now) is a virtual assistant that is intended to provide context-sensitive helpful information to users. It is closed source, pre-installed, and it cannot be uninstalled or disabled. And I had already turned off all its …

The Right to not be Tracked: a Spotlight on Google Maps and Android Location Tracking

K. Shankari blog 1 Comment

There has been a lot of interest in data collected about users by Facebook recently. Journalists have been shocked when they downloaded the data that Facebook has on them. Most of this concern has been focused around data collected through explicit user interaction such as web browsing, or clicking on “Like” and “Share” buttons. Background data collection, which occurs without any explicit user intervention, is arguably creepier, because it collects data whether or not you interact with the service. For example, Facebook has been criticized for logging texts and phone calls in the background. Facebook argues that users consented to sharing the data, although many users are still skeptical about how explicit the consent was. Similarly, Uber had to backtrack …

Open source platform + undergraduate energy = sustainability research

K. Shankari blog 0 Comments

This Earth Day, join a study on motivating sustainable transportation behavior. I have blogged about the e-mission project earlier in the context of the National Transportation Data Challenge. ( To recap, e-mission focuses on building an extensible platform that can instrument the end-to-end multi-modal travel experience at the personal scale and collate it for analysis at the societal scale. In particular, it combines background data collection of trips, classified by modes, with user-reported incident data, and context-sensitive surveys. I also blogged earlier about involving undergraduates in research ( To recap, the challenges at the time included managing different skill levels, compressing the learn-plan-build cycle into one semester, and the fact that undergraduates typically don’t have the experience to build platform …

Making cities safer: data collection for Vision Zero

K. Shankari blog

A critical part of enabling cities to implement their Vision Zero policies – the goal of the current National Transportation Data Challenge – is to be able to generate open, multi-modal travel experience data. While existing datasets use police and hospital reports to provide a comprehensive picture of fatalities and life altering injuries, by their nature, they are sparse and resist use for prediction and prioritization. Further, changes to infrastructure to support Vision Zero policies frequently require balancing competing needs from different constituencies – protected bike lanes, dedicated signals and expanded sidewalks all raise concerns that automobile traffic will be severely impacted. A timeline of the El Monte/Marich intersection in Mountain View, from 2014 to 2017 provides an opportunity to …