Category: Roadways

I’m on the home stretch for first update to Chicago Offline Bike Map app

May 6, 2012 / / 0 Comments

Splash screen of the app. 

Since making the first version of the Chicago Offline Bike Map app, a bike map stored in your iOS device and doesn’t need an Internet connection, I’ve made several important changes and added new features. I’ve upgraded twice how train stations will be appearing. I’ve completely changed the way it looks by using jQueryMobile. Also with v0.2 you’ll find more points of interest, locate yourself using the iOS device hardware (results will vary on a variety of hardware and location factors), and zoom to any neighborhood.

I want your help. I want to make a list of at least 20 points of interest. I’ve no qualifications, but this is who I think my target audience is: people who have cycled in Chicago for a while, people who have just started cycling, people who have iOS devices (I will expand to Android eventually), and who know how to use a map.

Current points of interest are:

  • All CTA and Metra stations
  • All neighborhoods
  • Peggy Notebaert Nature Museum
  • Field Museum of Natural History
  • Museum of Science and Industry
  • DuSable Museum
  • Harold Washington Cultural Center
  • Chicago Cultural Center
  • Holography Museum
  • Museum of Contemporary Art
  • Chicago City Hall
  • Chicago Velo Campus
  • Millennium Park Bike Station
  • SAIC Bike Fixit Station

Train stations on the map. 

Excluding train stations and neighborhoods, there are 12 points of interest. What else should I add? (Since posting this I’ve added the three largest libraries: Harold Washington Library Center, Woodson Regional, and Sulzer Regional.)

P.S. I plan to make an Android version of this app, but I have no timeline on that. Follow app development at the app’s Tumblr.

An enjoyable Friday morning collecting car speeds on Clark Street

May 5, 2012 / / 0 Comments

Watch this 7 second video of a person driving a late model Toyota Camry in Lincoln Park at 50 MPH, next to the park. 

mean 30.83 mph
median 31
mode 30
min 17
max 50
frequency: 121 cars
greater than 30 mph: 65 cars
% greater than 30 mph: 53.72%

Statistics exclude the three buses counted at 26, 18, 20. Time was 8:23 to 8:38 on Friday, May 4, 2012, at Clark Street and Menomenee Street. The street width at where I collected the data is 65’9″ (789 inches). This location is eligible for a speed camera as it is within 1/8 mile of a park and is thus a “Children’s Safety Zone”.

I’m still working on the report for an article to be published on Grid Chicago. I used this Bushnell Velocity Speed Gun.

My new favorite traffic crash impact analogy, as heard at a meeting about a road diet

April 27, 2012 / / 0 Comments

At Wednesday night’s community meeting at the University of Chicago Alumni House (5555 S Woodlawn) in Hyde Park about a proposed road diet and installation of protected bike lanes on 55th Street, a resident spoke up and asked about possible negative bus and bicycle interactions in the shared space bus stops.

In the proposed street reconfiguration plan, bus stops remain at the curb. The protected bike lane is curbside as well. Where they overlap, an unprotected bike lane “occurs” around the space created for the bus stop.

He likened the interaction to this (which is paraphrased): “It doesn’t matter if a rock falls on a melon, or if a melon falls on a rock, the melon still cracks open”.

Figuring out how many CMAQ projects are for roads

March 19, 2012 / / 0 Comments

Simplified, the purpose of Congestion Mitigation and Air Quality (CMAQ) grant is to fund projects that reduce congestion and improve air quality. This usually means bicycle, pedestrian, and transit facilities and vehicles. But it also means road projects. Like intersection widening, new signals, changes to signal programming, and “signal interconnect” (timing the signals to cooperate with each other to have some free flowing traffic). It can also mean making grade separations at railroad tracks to eliminate backups when trains cross. However, not everything is infrastructure: there’s also marketing, encouragement, analysis, bike sharing, and education.

In a conversation I was having last night with some transportation advocate friends, one joked that most of CMAQ funds road projects. I agreed (probably because the irony of reducing congestion by making higher capacity roads was funny to me), and we moved on to other topics. I set out verify the actual distribution share for the six-county region in Northeastern Illinois.

I spent almost an hour converting the Chicago Metropolitan Agency for Planning’s CMAQ 2012-2016 projects list from PDF to Excel and then quickly identified every project as being “road” or “not road”. I tallied the amount of proposed CMAQ funding for the projects to get the answer: road projects take up 25.7% of CMAQ funding.

But I can’t stop there! Now that I have CMAP’s data in a spreadsheet, I can get the average of Daily VOC eliminated for road and non-road projects, as well as the estimated cost per VOC kilogram eliminated.

On average, non-road projects have a lower cost per VOC kilogram eliminated ($4,109.37 versus $9,472.90). And non-road projects on average eliminate 19.7 times more kilograms of VOC daily (5.918 kg versus 0.301 kg for road projects).

There are some disclaimers! These are all estimates and not every project has received funding. Also, projects are not selected solely on cost per kilogram of VOC eliminated, or daily VOC eliminated. I’d also like to see estimates on the number of people affected by each project.

You can check my math by downloading my modified projects list (XLS).