Steven Can Plan
Currently viewing the tag: "household travel survey"
Two tables in this post. Data from the Chicago Metropolitan Agency for Planning’s 2008 Travel Tracker Survey. Download source file (pdf).
Table 1. Number represents share of trip miles taken by that mode. So in Central Chicago (which seems to comprise neighborhoods as far north as Uptown and as far south as Hyde Park), 1.4% of all trip miles are by bike. If 1,000 people take 100 trips of 2 miles each, then 2,800 miles will be by bike.
Walk | Bike | Driver | Passenger | CTA Bus | CTA Train | Pace | Metra | Private Shuttle Bus | Para- transit | School Bus | Taxi | Other |
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Central Chicago | 6.10% | 1.40% | 49.80% | 22.90% | 9.10% | 7.10% | 0.30% | 1.80% | 0.10% | 0.10% | 0.30% | 1.00% | 0.10% |
| North Chicago | 4.20% | 0.70% | 52.90% | 28.70% | 4.10% | 6.80% | 0.60% | 0.90% | 0.20% | 0.00% | 0.50% | 0.20% | 0.20% |
| South Chicago | 4.20% | 0.00% | 46.00% | 30.60% | 8.40% | 4.80% | 0.60% | 2.40% | 0.70% | 0.20% | 1.50% | 0.30% | 0.20% |
| North Cook County | 2.00% | 0.80% | 64.60% | 22.00% | 0.70% | 1.40% | 0.50% | 5.90% | 0.20% | 0.00% | 1.70% | 0.10% | 0.10% |
| West Cook County | 1.80% | 0.30% | 60.70% | 26.80% | 0.70% | 4.60% | 0.70% | 2.60% | 0.20% | 0.10% | 1.30% | 0.10% | 0.10% |
| South Cook County | 2.50% | 0.10% | 63.60% | 21.80% | 0.40% | 1.40% | 1.40% | 6.90% | 0.30% | 0.10% | 1.40% | 0.00% | 0.00% |
Table 2. Number represents share of trips taken by that mode, regardless of distance.
Walk | Bike | Driver | Passenger | CTA Bus | CTA Train | Pace | METRA | Private Shuttle Bus | Para- transit | School Bus | Taxi | Other |
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Central Chicago | 26.40% | 2.00% | 33.30% | 20.00% | 10.90% | 4.60% | 0.20% | 0.60% | 0.10% | 0.10% | 0.30% | 1.00% | 0.30% |
| North Chicago | 15.30% | 1.50% | 44.20% | 24.40% | 6.90% | 5.20% | 0.50% | 0.40% | 0.20% | 0.00% | 0.90% | 0.20% | 0.20% |
| South Chicago | 13.20% | 0.10% | 41.10% | 27.50% | 11.30% | 3.10% | 0.70% | 1.00% | 0.30% | 0.20% | 0.70% | 0.50% | 0.20% |
| North Cook County | 8.30% | 1.40% | 59.30% | 25.30% | 0.60% | 1.00% | 0.50% | 1.40% | 0.10% | 0.00% | 1.90% | 0.10% | 0.10% |
| West Cook County | 11.00% | 0.90% | 53.00% | 27.00% | 1.30% | 2.40% | 1.30% | 0.90% | 0.10% | 0.00% | 1.70% | 0.20% | 0.10% |
| South Cook County | 6.70% | 0.50% | 59.20% | 26.60% | 0.50% | 0.80% | 1.20% | 1.80% | 0.20% | 0.10% | 2.50% | 0.00% | 0.10% |
I have low expectations of fellow Chicagoans who are moving their vehicles on the same roads I cycle on. I expect that every door will fling open in my path, causing me to be doored. I also expect to be cut off at any moment, and especially in certain places like at intersections (where the majority of crashes occur), bus stops, or in places with lots of parallel parking activity. Because of these expectations I feel that my journeys have been pretty safe. My low expectations cause me to ride slower, ride out of the door zone, and pay attention to everyone’s maneuvers.
This is another post inspired by Traffic: Why we drive the way we do (and what it says about us) by Tom Vanderbilt. From page 227 of “Traffic”, about expectations :
Max Hall, a physics teacher in Massachusetts who often rides his collection of classic Vespas and Lambrettas in Rome, says that he finds it safer to ride in Rome than in Boston. Not only are American drivers unfamiliar with scooters, he maintains, but they resent being passed by them: “In Rome car and truck divers ‘know’ they are expect not to make sudden moves in traffic for fear of surprising, and hurting, two-wheeler drivers. And two-wheeler drivers drive, by and large, expecting not to be cut off.”
The scooter drivers have high expectations, and it seems that they’re being met.
This all plays nicely with the “safety in numbers” theory about cycling: the more people who are riding bicycles, the more visible bicycling is, and the more aware a driver will be around people who are bicycling, and the more they will expect someone on a bicycle. Awareness means caution.
It’s difficult to gauge the safety of cycling in Chicago as we’ve no exposure rate: we don’t know how many people are cycling how many miles (nor where).
A cyclist waits for the light to change at Milwaukee Avenue and Ashland Avenue.
Exposure rate
Exposure rate in the sense I’m using it here means the number of times someone is in a crash or injury for each mile they ride. We know how many crashes and injuries are reported each year (in the Illinois Motorist Crash reports), but we don’t know how many miles people ride (neither individually nor an estimated average).
There was a limited household survey of Cook County residents in 2008 from CMAP, called Travel Tracker, that collected trip distance information for all trips members of a household made on all trip modes – I haven’t looked into this yet.
It would be highly useful if the Chicago Department of Transportation conducted ridership counts at the 10 intersections with the highest crash rates. And if the 10 intersections changed the following year, the new intersections would just be added to the initial 10 to track the changes of the initial 10. This would be one step closer to being able to determine a “crash rate” for each intersection.
About Steven Can Plan
I started this blog in 2007 as the writing assignment for an introductory urban planning class at UIC. It's about cities (mainly Chicago), GIS oftentimes, and transportation (mainly bicycling). Learn more about me, Steven Vance. I also write for Streetsblog Chicago.
Steven Can Plan is hosted on Dreamhost.
Chicago Bike Map App
The Chicago Bike Map app is a bike and street map stored entirely in your iOS device – no data connection required. The map is designed to look much like the City of Chicago's official printed and online bike map. The app works on iPhone, iPod touch, and iPad.
- Download from the iTunes Store
- Demo the app online
- On iOS, search for "chicago bike map" in the App Store app
Highly Recommended Bike Products
Planet Bike SuperFlash taillight
The best value taillight. It has three red LEDs that alternate and provide extreme brightness. I have two of these.
These folding locks are lighter weight and more versatile than an equally strong u-lock.
Brooks B67 leather sprung saddle
So far my longest trip was 40 miles on this saddle. It molds to your butt like Birkenstock sandals mold to your feet. The springs make the bike ride a little more comfortable and more fun (weird, because you bounce up and down on them). It also looks gorgeous. Comes in 3 colors - I got black.
Books
The Practice of Local Government Planning (Municipal Management Series) by
You could basically design and administer a new town kind of effectively after reading this huge and boring textbook.
Joyride: Pedaling Toward A Healthier Planet by Mia Birk, With Joe (Metal Cowboy) Kurmaskie, Joe Kurmaskie, Jim Moore
I met Mia Birk in October 2011.
Making Maps: A Visual Guide to Map Design for GIS by John Krygier PhD, Denis Wood PhD
If you are going to make a map, whether it be hand drawn or digital, you should really give this book a read. Then read it every time you make a map. It will help make sure your maps are laid out sensibly, in a way that others can easily read, and that it doesn't include fluff or unnecessary data.
Sustainable Transportation Planning: Tools for Creating Vibrant, Healthy, and Resilient Communities (Wiley Series in Sustainable Design) by Jeffrey Tumlin
I was sent a review copy. I'm really excited to open it up and start reading because I've been disappointed with textbooks in the past that don't focus on bicycle and pedestrian planning.
Traffic: Why We Drive the Way We Do (and What It Says About Us) by Tom Vanderbilt
As someone who doesn't like driving, but believes that cars can be efficient in moving groups of people and goods, this is my favorite book.
