Thursday, May 30, 2013

Commuter-adjusted Population

See the recent article on The Atlantic Cities on "The Most Important Population Statistic That Hardly Ever Gets Talked About". The article discusses about the underscored importance of the "commuter-adjusted population" metric which can be obtained from the American Community Survey Data.
"Commuter-adjusted populations tell us a lot about where the jobs are and which communities do little more than give people a place to sleep. Count people where they work, and not where they live, and the resulting picture also further blurs the divide between cities and suburbs (and how we think about who is invested in which places)."

Some Statistics of the Capital Bikeshare Program in Washington D.C.

Using "Trip History Data" provided by the Capital Bikeshare program in Washington, D.C., I plotted the trip duration distribution in their system for the 1st quarter of 2013 and 2nd quarter of 2012.

Some insightful statistics:
  • Total number of trips in the 1st quarter 2013 was 46,598 while the total number of trips in the 2nd quarter 2012 was 572,919. More than 12 times larger. Showing the seasonal effect of bike-sharing demand.
  • Most of the trips were between 10 to 20 minutes. Trip duration could be a function of the pricing policy and the actual length of a trip.
  • In the 1st quarter 2013, average trip duration was 14 minutes while in the 2nd quarter 2012, the average trip duration was 19 minutes.
  • In the 1st quarter 2013, only about 1% of the trips started and ended at the same station, while in the 2nd quarter 2012, 5% of the trips started and ended at the same station. Starting and ending a trip at the same location could be an indication of a leisure trip.
  • In the 1st quarter 2013, about 6% of the trips were longer than 30 minutes but smaller than 60 minutes while in the 2nd quarter 2012, about 10% of the trips violated the 30 minute limit of the free ride policy.




Tuesday, May 28, 2013

Bike Chicago: Bike the Drive 2013


The 6th video of the "Bike Chicago" project. Enjoy the ride on the Lake Shore Drive from Bryn Mawr to the Museum of Science and Industry on 57th St as part of the Bike the Drive 2013. Make sure to watch it in HD (720p).

Friday, May 24, 2013

Bike-Share Programs as an Extension to Public Transit


 A recent article on the Atlantic Cities on "Bike-Share May Not Take Many Cars Off the Road, But That's OK" suggests that bike-share programs can actually work as an extension to public transit and make less accessible by transit places, more accessible by transit-and-bike. Putting bike-share stations at transit stations sounds like a good idea.

Monday, May 20, 2013

Bike Chiago: Busse Woods Trail, Elk Grove, IL


The 5th video of the "Bike Chicago" project by Meead Saberi. Wonderful ride on the Busse Woods trail, Elk Grove, IL. Make sure to watch it in HD (720p).

Sunday, May 19, 2013

List of Archived Traffic Flow Webinars

Here is a list of archived traffic flow webinars hosted by of the Traffic Flow Theory and Characteristics Committee of the Transportation Research Board (TRB) of the National Academies

Wednesday, May 15, 2013

Bike Chicago: Lakefront Trail from Division to Irving Park


The 4th video of the "Bike Chicago". A cool ride along the lakefront trail from Division to Irving Park during the sunset time. The video ends with taking the bike on the CTA red line on Addison. Make sure to watch it in HD (720p).

Friday, May 10, 2013

Bike Chicago: Downtown Chicago



The 3rd video of the "Bike Chicago" project. An amazing bike ride in beautiful downtown Chicago. Make sure to watch it in HD (720p).

Wednesday, May 8, 2013

Bike Chicago: Magnificent Mile


The second video of the "Bike Chicago" project by Meead Saberi. A fun ride during the late afternoon rush hour on the Magnificent Mile, Michigan Ave, Chicago. Make sure to watch it in HD (720p).

Tuesday, May 7, 2013

Bike Chicago: Rogers Park to Northwestern University


The first video of the "Bike Chicago" project. This is a video of my daily commute from Rogers Park to Northwestern University, Evanston. Make sure to watch it in HD (720p).

Wednesday, May 1, 2013

Home Locations of TRB Attendees

Courtesy of AIRSAGE, the map below shows the home locations of TRB 2013 attendees obtained from more than 4,000 sampled mobile devices. Pretty cool!