Category: Bicycling

What is Conversation Cycling?

January 17, 2012 / / 0 Comments

Mikael Colville-Anderson posted a link to this photo set called Conversation Cycling (his photo above). The concept of Conversation Cycling is simple:

Build a bikeway so two people can cycle side-by-side to have a pleasant chat. 

I want this for Chicago. When you ride with friends, how would you prefer to ride: yelling ahead in our narrow bike lanes or conversing to the side? This is sometimes possible on the Lakefront Trail, but not always: the Lakefront Trail’s maximum width is the same as the standard with for cycle tracks in Europe!

Bike lanes in the United States, when they’re available and not being parked in, are not even wide enough for one person to ride without danger of being doored. It’s not surprising this is the case. In addition to how we prioritize the movement of automobiles and the placement of parking before pedaling, the national minimum width for a bike lane is 4 feet (without gutter), or 5 feet when next to parked cars or with a gutter.

I gathered some hard evidence: My handlebars are 28 inches wide. The door of my roommate’s car is 32 inches wide. 28+32 = 60 inches, or 5 feet. And that’s without a buffer. Essentially, bike lanes as we’ve built them are not compatible with the rest of the street.

Two Department of Revenue workers cycle side by side, meeting the edges of the bike lane, on Armitage Avenue in Lincoln Park. Photo by Mike Travis. 

Door zone bike lanes are not unique to any American city. Illustration by Gary Kavanagh. 

A group cycles on Damen Avenue in and out of the bike lane. Photo by Eric Rogers. 

Crashes by bike or by foot at different intersections

January 16, 2012 / / 0 Comments

While working on a private web application that I call Chicago Crash Browser, I added some code to show the share of pedestrian and pedalcyclist crashes. The site offers users (sorry I don’t have a web server that can make it public) a list of the “Top 10” intersections in terms of bike crash frequency (that’s bike+auto crash). You can click on the intersection and a list will populate showing all the pedestrian and pedalcyclist crashes there, sorted by date. At the bottom of the list is a simple sentence that tells what percentage pedestrian and pedalcyclists made up at that intersection.

I’m still developing ideas on how this information may be useful, and what it’s saying about the intersection or the people using it.

Let me tell you about a few:

Milwaukee Avenue and Ogden Avenue

I mentioned in my article Initial intersection crash analysis for Milwaukee Avenue that this intersection is the most bike crash-frequent.

23 crashes within 150 feet of the center, 2005-2010

82.61% bike crashes **

17.39% ped crashes.

Ashland Avenue and Division Street

28 crashes within 150 feet of the center, 2005-2010

46.43% bike crashes

53.57% ped crashes **

Milwaukee, North and Damen Avenues

46 crashes within 150 feet of the center, 2005-2010

39.13% bike crashes

60.87% ped crashes **

Halsted Street, Lincoln and Fullerton Avenues

38 crashes within 150 feet of the center, 2005-2010

42.11% bike crashes

57.89% ped crashes **

Montrose Avenue and Marine Drive (Lake Shore Drive ramps)

11 crashes within 150 feet of the center, 2005-2010

90.91% bike crashes **

9.09% ped crashes

Why do you think some intersections have more of one kind of crash than the other?

People walking at Milwaukee-North-Damen.

The Chicago Crash Browser can be made public if I have a host that offers the PostgreSQL database. Do you have one to offer?

Looking at multi-unit residential bike parking

January 9, 2012 / / 0 Comments

Residential complexes with eight or more units are required to have bike parking because they’re required to have parking. The zoning code requires a ratio of 1 bike parking space to 2 car parking spaces (the quantity of car parking spaces it needs is a determination the Department of Housing and Economic Development makes).

A Grid Chicago reader recently sent me some photos of the bike parking inside the parking garage at the 900 S. Clark AMLI South Loop Apartments (see map). I was not surprised by what they showed based on what I’ve seen at other residential complexes in Chicago.

The photo above shows a double-decker bike rack with height alternating bike parking slots. This means that bikes can theoretically be spaced closer together because one bike’s handlebars won’t interfere with the bikes on either side of it. The bike rack has 10 slots. There are at least 16 bikes in the photo (it’s hard to count them from just the picture) and it seems only 5 are actually in slots.

The Chicago zoning code that applies to this situation is section 17-10-0207-C. As the complex is providing over 200 car parking spaces in this garage (I counted them in Google Earth), the AMLI South Loops Apartments must be providing 50 bike parking spaces (17-10-0301-B says max 50). Granted, the remaining 40 spaces could be inside the apartment tower, I highly doubt it. I don’t have enough information about this location to know if zoning code was not correctly or fairly applied.

Aside from obviously not having enough bike parking spaces, here’s what else isn’t cool about this bike parking installation:

  • The rack design offers no locking points. I believe this rack was intended to hold bikes at a retail store.
  • It’s outside, so bikes are getting wet
  • It’s over 200 feet away from any residential unit
  • It’s in a far corner of the parking garage (but not the furthest from the garage entrance)
  • An upper level rack design is not easy to use: one must first lift their bike to the second level, and then awkwardly reach around the frame and wheels to lock it.

I’ve created the Simple Bike Parking website as a resource and tool for anyone who wants to install bike parking. It discusses the three rules I’ve developed over the 4+ years I’ve consulted on bike parking in Chicago. It’s simple to have good, useful, and desirable bike parking if it’s:

  • Close to the entrance where people commonly enter and exit
  • Of the right design (nothing hard to use, please)
  • Placed at least 36 inches away from anything else, on all sides

There are a lot of abandoned bikes on the streets of Chicago, but I’m sure there are plenty more in residential buildings. I’m blaming difficult to reach and hard to secure bikes for this.

Updated 1145h to correct the maximum number of bike parking spaces a developer must provide, based on a different reading of the zoning code prompted by a reader. Thanks, Erik. 

The local bike shop: first line of education for smart city cycling

December 18, 2011 / / 0 Comments

I left this as a comment on Better Bike, a campaign for safe streets in Beverly Hills, California, on a post about cycling and mobility education, and driver’s ed.

I don’t think cycling classes in Chicago are well-publicized. If someone asked me about them, I would just say, “Go see the Active Transportation Alliance website”. But I don’t actually know if that information is on there.

Occasionally the REI in Chicago holds free informational classes, but can someone sign up for a smart city cycling class there? Or anywhere?

In addition to the all of the things that the smart city cycling class you describe in the post offers the students who sign up (a self-selection bias to mobility and cycling education), bike shops are a place where people can receive education on how to ride safely, assertively, and defensively on urban roads. The bike shop salesperson or mechanic is the last person one sees and listens to before they put their new wheels on the asphalt.

I’ll add that bike dealers can do a lot of other things that make cycling more convenient for people:

  • Register bikes, at the sale point, with the police so if a bike is found the owner’s contact information is in the database
  • Teach people the ABC Quick Check, or whatever’s in vogue.
  • Invite the purchaser to ask questions at the sale time, and ask them to come back any time to ask questions. Create a relationship with the purchaser and set a tone that there are no bad questions.

I believe there are bike shops that do these things (I haven’t purchased a bike myself in a while, nor do I feel I need this education), but I feel that not enough do. I think that if bike dealers were educating customers I would be witnessing fewer hairy maneuvers on the road, and bikes in better condition (like tires with air).

This is next to impossible when so many bikes are purchased from department stores.

Note: Bike dealers in Chicago are required by ordinance to submit sale information to the Commissioner of Police: “Every person engaged in the business of buying or selling new or second hand bicycles shall make a report to the commissioner of police of every bicycle purchased or sold by such dealer, giving the name and address of the person from whom purchased or to whom sold, a description of such bicycle by name or make, the frame number thereof, and the registration number, if any, found thereon.” 9-120-080.

It doesn’t say when or how often. And it says “frame number”, which I don’t understand as this doesn’t identify the bike uniquely. A different ordinance requires bicycle purchasers to register themselves the serial number.

Some crash analysis based on gender/sex in Chicago

December 13, 2011 / / 0 Comments

A friend sent me an article saying that in London, women were experiencing crashes more often than men while cycling (BBC article). He asked if this was true about Chicago. So I crunched the numbers. This is very low-level, initial, take it with a grain of salt analysis. It appears that that is not the case for Chicago.

It appears that men walking or cycling are involved in disproportionately more crashes with automobiles than women, but not very disproportional.

1. Men make up 72.73% of people cycling (to work, the only trip purpose for which I have data). And they experienced 75.75% of the crashes with automobiles (to where is unknown).

2. Men make up 48.45% of people walking (to work, again, the only trip purpose for which I have data). And they experienced 53.38% of the crashes with automobiles (again, to where is unknown).

This analysis also points out shortcomings in our data. Even with National Household Travel Survey I don’t think I could get very detailed (as the statistics would be too aggregated and the sample size for Chicago would be small). This data is based on two sources: motorist crash reports from 2007-2010 from the Illinois Department of Transportation (IDOT); and American Community Survey “means of transportation to work”. The last time a household travel survey was done in Chicago was 2008 and I just acquired that data last week. I need to figure out how to connect the people and trip tables and then I can do more analysis, getting exposure data for all trips, not just work.