A few years ago the Nashville Area MPO conducted an informal survey of bicyclists to find
out about unreported crashes and how many crashes were caused by interaction with a
vehicle vs. gravel on the road, fixed object, etc. We received around 600 responses. I
am not aware of a way to collect information about unreported crashes other than doing
something like this survey, which is far from perfect but at least provides some insight.
Summary of findings
Presentation of findings
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1. Re: bike injuries (mbrenman001(a)comcast.net)
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Date: Fri, 18 Jan 2013 17:03:34 +0000 (UTC)
Subject: Re: [H+T--Friends] bike injuries
To: TRB Health and Transportation <h+t--friends(a)chrispy.net>et>,
Cc: meganwier(a)gmail.com, Rochelle Dicker <DickerR(a)sfghsurg.ucsf.edu>
Content-Type: text/plain; charset="utf-8"
I would submit that another likely cause for a rise in bike injuries is lack of attention
to and compliance with rules of the road by bicyclists. Who among has not noticed
bicyclists running red lights, not stopping for stop lights, weaving through traffic, not
using hand signals, etc?
----- Original Message -----
From: "Rajiv Bhatia" <Rajiv.Bhatia(a)sfdph.org>
To: "TRB Health and Transportation" <h+t--friends(a)chrispy.net>
Cc: meganwier(a)gmail.com, "Rochelle Dicker" <DickerR(a)sfghsurg.ucsf.edu>
Sent: Friday, January 18, 2013 8:42:20 AM
Subject: [H+T--Friends] bike injuries
In SF, we have also observed a very high proportion of bike injuries going unreported.
Rochelle Dicker, cc'd above and head of the SFGHMC trauma unit, has done some thinking
and analysis on this issue using hospital records.
As you know, SF has had a fairly agressive bike infrastructure program with strong
political support. Bicycling behavior has increased substantially over the past decade as
evidenced by serial bike counts. Unfortunately, reported bike collision injury frequency
almost doubled over the past 5 or
6 years despite the investments in bike facilities. Potential culprits here could be the
co-location of bike facilities on arterials, newer riders, and the lack of reduction in
vehicle traffic. The confluence of new infrastructure, growth in riders, growth in
injuries suggest that SF may be a good place to study the safety effects of new bike
infrastructure in an existing urban context.
Locally, we are also very interested in redesigning our traffic injury surveillence system
to integrate hospital, police, and ambulence records and add public health / environmental
surveillence components. There are some good models in other countries. We have political
committment and data sharing agreements but lack $$ -- I am told that local transportation
$$ coming to cities cannot be used for such purposes.
Rajiv Bhatia, MD, MPH
Director, Environmental Health, Department of Public Health
1390 Market Street, Suite 822
San Francisco, CA 94102
(t) 415 2523931
From: Ed Christopher <edc(a)berwyned.com>
To: TRB Health and Transportation <h+t--friends(a)chrispy.net>
Date: 01/17/2013 02:11 PM
Subject: [H+T--Friends] A Data Question Sent by: h+t--friends-bounces(a)chrispy.net
It was nice to see everyone at TRB. While there I was in a discussion about the probably
that bike crashes that result in injuries might be under represented in our crash data.
Especially when you consider that a high percentage of the crashes do not involve a motor
vehicle and never make it to police records. If i were trying to get a handle on this at a
regional or state level are there any "non-traditional" sources of data like
hospital records that can be used. Anyone doing any work in this area?
This is becoming ever so important as we see more and mode shifting going on.
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