by James A. Bacon

It is axiom of the smart growth movement that, although fear of crime may predominate in the popular mentality, motor vehicle crashes represent every bit as much of a threat to peoples’ safety and well being. Because accidents are more likely to occur in the countryside and the ‘burbs (my term for human settlement patterns that are characterized by segregated land uses, low density and disconnected development), people are arguably less safe than if they lived in urban areas that are traditionally thought to be hotbeds of crime.

Just for yucks, I pulled 2010 data from the Division of Motor Vehicles and the State Police’s “Crime in Virginia 2010” report. Here, for your viewing pleasure, I compare the impact of crashes vs. crime upon public safety.

First, let’s compare the number of incidents involving property loss: motor vehicle crashes on the one hand and robberies, burglaries and stolen property on the other. It’s not even close. Automobile accidents are a much more frequent occurrence. (Click on charts for more legible image.)

Next, let’s take a look at the number of incidents involving bodily harm: the number of people injured in traffic accidents versus the number of people reported as victims of violent crimes (including murder, manslaughter, kidnapping, abduction, sex offenses and assault). In this case, you are more likely to be a victim of a violent crime than to be in injured in a traffic accident. However, it is important to note that the vast majority of these offenses consist of “assaults,” and that the overwhelming majority of “assaults” consist of “simple assaults” or threats in which the victim suffers no “obvious severe or aggravated bodily injury involving apparent broken bones, loss of teeth, possible internal injury, severe laceration or loss of consciousness.” I’m not a lawyer, so I may be mistaken about this, but if someone shoves you and you fall over, that’s an assault.

Finally, take a gander at fatal encounters: motor vehicle fatalities versus . homicides and manslaughter. Virginians are twice as likely to die in an automobile accident as to be killed in a crime. Furthermore — and I say this in the belief, perhaps mistaken, that relatively few Bacon’s Rebellion readers are selling crack or operating meth labs, and thus are less likely to consort with people who settle their disputes with guns, knives and blow torches — law-abiding citizens are way more likely to die from being hit by a random car than to be murdered by an anonymous criminal.

So, there you have it. The statistics speak for themselves. If you live in the country or the ‘burbs, you’re not nearly as safe as you think.

Update: Ed Risse reminds me of the detailed work on this subject conducted by Bill Lucy at the University of Virginia. (Heck, I probably blogged about it.) See a summary of his findings here.


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14 responses to “Charts of the Day: Crashes vs. Crime”

  1. But you did not make any comparison between urban and nonurban living. Only between crime and auto damage, both undifferentiated as to location.

    Part of the problem is that most auto incidents are classified as accidents, when in fact, many incidents are actually crimes: the unintended result of a criminal action deliberately taken.

    Anyone can have an accident, but if you are deliberately driving on the shoulder and hit someone, that is not an accident. I believe that most tears end collisions oils properly be categorized as assault, because the result from aggressive driving.

    Beyond that, virtually everyone engages in auto travel, but only a few engage in burglary and assault. Therefore it is no sulfide that any stats on one activity outnumber those of the other.

    It is another claimed axiom of smart growth / anti growth activists that is unsupported.

    Using your reasoning, we may as well say urban areas are more dangearous because more people die there.

  2. I have been assaulted three times while walking, and never while driving, not counting aforesaid aggressive drivers.

  3. I agree, the statewide data is very rough. It would be useful to break down the statistics by locality — or even zip code. We’d be able to reach much firmer conclusions. What seems beyond debate, however, is the fact that the magnitude of injury and property loss due to traffic accidents is comparable to the loss due to crime.

  4. we’re concentrating on the wrong thing….
    ” On an average each year about 2,982 fatalities, about 31 percent, occur in crashes at intersections controlled by traffic signals; 3,643 fatalities, about 38 percent, occur at intersections controlled by stop signs and 2,593 fatalities, or about 27 percent, occur at intersections with no traffic
    control devices”

    http://www-nrd.nhtsa.dot.gov/Pubs/810682.pdf

    ” A 2001 Institute study of 23 intersections in the United States reported that converting intersections from traffic signals or stop signs to roundabouts reduced injury crashes by 80 percent and all crashes by 40 percent.1 Similar results were reported by Eisenman et al.: a 75 percent decrease in injury crashes and a 37 percent decrease in total crashes at 35 intersections that were converted from traffic signals to roundabouts.2 A study of 17 higher speed rural intersections (40 mph and higher speed limits) found that the average injury crash rate per million entering vehicles was reduced by 84 percent and fatal crashes were eliminated when the intersections were converted to roundabouts.”

    http://www.iihs.org/research/qanda/roundabouts.html

  5. Your comment is awaiting moderation. … you should fix this if you can.
    why in the world does providing a web site link shunt comments to “moderation:?

    we’re concentrating on the wrong thing….
    ” On an average each year about 2,982 fatalities, about 31 percent, occur in crashes at intersections controlled by traffic signals; 3,643 fatalities, about 38 percent, occur at intersections controlled by stop signs and 2,593 fatalities, or about 27 percent, occur at intersections with no traffic
    control devices”

    www-nrd[dot]nhtsa.dot.gov/Pubs/810682.pdf

    ” A 2001 Institute study of 23 intersections in the United States reported that converting intersections from traffic signals or stop signs to roundabouts reduced injury crashes by 80 percent and all crashes by 40 percent.1 Similar results were reported by Eisenman et al.: a 75 percent decrease in injury crashes and a 37 percent decrease in total crashes at 35 intersections that were converted from traffic signals to roundabouts.2 A study of 17 higher speed rural intersections (40 mph and higher speed limits) found that the average injury crash rate per million entering vehicles was reduced by 84 percent and fatal crashes were eliminated when the intersections were converted to roundabouts.”

    http://www.iihs[dot]org/research/qanda/roundabouts.html

  6. It is not beyond debate, it is exactly the debate.

    Roundabouts have fewer serious crashes than traffic lights, but they cost roughly one million dollars more.

    The fact is we have injuries and deaths due to autos and crime.

    Where it happens is only of marginal interest. If you think one life is valued the same as the next, then you want to spend your money where it will save the most lives at lowest cost.

    I suspect, but do not know, that we are far more efficient at engineering and enforcing road safety than we are at preventing crime. Especially preventing crime by, say, enforcing the borders.

    If that is the case, then we should be spending a lot more on highway and vehicle safety and traffic enforcement, according to Jim’s stats.

    Say you put in a roundabout and statistically it prevents one death at that intersection every ten years. Time value of money, tells you that works out to a million dollars per life saved, forever. That is pretty cheap, since EPA and OSHA use $8 million as a workable number.

    If your loved one gets killed in a traffic accident that could have been prevented for a million dollars, while OSHA was busy spending $8 million to prevent a mining death, or homeland security was spending $20 million, then your loved one got robbed. Government decided that someone else’s life was worth more to protect, and your loved one suffered from unequal protection of property rights, namely the right to have his life and limb protected EQUALLY with anyone else.

    The debate is not ONLY how many die or suffer injury one way vs another. It is also how efficient we can be at prevention.

    Obviously, the law of diminishing returns suggest that as we make highways safer, each additional prevention costs more. Eventually you are better off diverting money to mine safety or crime prevention, or pollution control: wherever it is cheapest to save the next life. Which is why location makes very little difference.

  7. With regard to Larry’s stats one issue is how long it takes before a million vehicle enter an intersection. The shorter that period of time, the higher the payback on the million bucks spent on the roundabout.

    When it comes to ” ss Ingram money” and saving lives, its like the old joke : ” How is your wife?”

    ” Compared to what? “

  8. Ss Ingram was supposed to read saving money.

  9. ” Roundabouts have fewer serious crashes than traffic lights, but they cost roughly one million dollars more.”

    they cost more initially to build but over the life of the intersection they are many, many times cheaper….and safer….

  10. ” The debate is not ONLY how many die or suffer injury one way vs another. It is also how efficient we can be at prevention.

    Obviously, the law of diminishing returns suggest that as we make highways safer, each additional prevention costs more. ”

    I love the way Hydra twists and turns on these things.

    Cost-benefits are clearly in favor of roundabouts… AND they are MORE EFFICIENT … virtually all studies show this.

  11. ” Year one construction costs are comparable. Roundabout
    construction costs are estimated at $735,855 compared to $707,492
    for a signalized intersection.1 Advantage: signalized intersection.
    It is in the cost for annual maintenance beginning in year two
    where the advantage of roundabouts over signalized intersections
    becomes clear. Though the difference is slight ($2,000 for the
    former versus $5,000 annually for the latter),2 over a 29-year
    period, cost savings for roundabouts versus signalized intersections
    amount to $90,000.”

    ” “roundabouts have been shown to
    reduce fatal and injury accidents as much as 76% in the USA, 75%
    in Australia, and 86% in Great Britain,” attributing the reduction to
    “slower speeds and reduced number of confl ict points.”3 Similarly,
    “a 2001 Insurance Institute for Highway Safety (IIHS) study of
    23 intersections in the United States reported that converting
    intersections from traffi c signals or stop signs to roundabouts
    reduced injury crashes by 80% and all crashes by 40%.4
    An average of accident data, which was assumed to remain
    unchanged for the 29-year period, indicated that a signalized
    intersection at 29th and Urish could be expected to see six PDOs
    and one injury accident per year (in this case non-fatality). A PDO
    accident results in a total societal average cost of $2,900 and
    $179,250 for a fatal/injury accident.5 Using the IIHS’s estimated
    average accident reduction fi gures (with injury/fatality accidents
    deemed inclusive of PDOs), the 29-year comparative cost savings
    attributed to the roundabout is $313,200 for PDOs and $4,302,000
    for injury/fatality, a striking monetary differential, but one that is
    even more pronounced when safety value is considered.
    Where the dollars and cents advantage of roundabouts over
    signalized intersections accrues to taxpayers is in the savings
    achieved through drastic reductions in gasoline consumption, also
    resulting in substantial decreases in CO2 emissions. According
    to the IIHS, “a study of 11 intersections in Kansas found a 65%
    average reduction in delays and a 52% reduction in vehicle stops
    after roundabouts were installed. Translated to fuel savings, the
    IIHS then indicates that “constructing roundabouts in place of traffi c
    signals can reduce fuel consumption by about 30%,”

    http://www.cityofshawnee.org/pdf/traffic/Roundabouts.pdf

    any way you cut it two things are true:

    1. – roundabouts are much more cost-effective than signalized intersections

    and

    2. – overall accident statistics would likely drop – undermining the premise of comparing crime to accidents …..

    and that exposes some of the fallacies inherit in the way think tanks (and those who play think tank games) these days tend to use cherry-picked, out of context data to “analyze” ….. things…

    so you have otherwise perfectly intelligent people believing that increased poverty is because of increased entitlements rather than the other way around.

    looking at data in isolation is what is at the root of this and it also illustrates a key failing of our education system in that one of the weakest areas of the US education system is – real-world critical thinking skills.

    those would be the skills necessary to sort through data and information and to develop… NOT ideologies from them – but – SOLUTIONS to problems.

    Our sound-bite society looks for black/white explanations and solutions these days and is unwilling to invest the mental horsepower to get to the root of matters and from that – to find ways forwards.

  12. But Larry, safer compared to what? You are only comparing to intersections, and my point is that to be fair, you need to compare all safety projects and rank them.

    You have twisted things by comparing two inbuilt projects. In reality you will most likely replacement e an already constructed intersection with a new rounds out at additional cost. I’ll take $750 k as close enough to a million, which is what the ones in middlburg cost, and a proposed one in oak bluffs mass. Which is being fought tooth and nail via ” citizen participation”

    My points are 1. Location is a small matter when saving lives or preventing harm is concerned. 2. We cannot prevent all harm, but we prevent the most by starting with the least expensive projects first, for that we need good measurements, and ones we can agree on. 3. Not all roundabouts are equally efficient. One that replaces a high volume intersection will save more damage sooner. A roundabout slapped in the middle of nowhere, just because it is better than the intersection it replaced may never pay, compared to the same amount spent on crime prevention in some urban location. 4. Diminishing returns apply to all projects, from border control to roundabout installation, so the efficiency curves change over time: You might build a thousand roundabouts and then discover the next one wont pay, compared to the same amount spent on mine safety or bullet proof vests. 5. This is a fundamental flaw with all advocacy, and a cause of our current budget problems. Advocacy turns into zealotry, with no way out and no intention of quitting once the cause has been served.

  13. well the facts are clear – when it comes to intersections – which are a significant percent of deaths from auto accidents – the info I supplied you easily demonstrates that lives lost at round-a-bouts is minuscule to non-existent when compared to intersections and it’s even MORE TRUE in rural areas

    roundabouts are also the best way to connect neighborhoods to each other and surface streets while at the same time discouraging cut-thru traffic – which is usually too fast and unsafe and the reason why people don’t want their neighborhood connect to two surface streets.

    the best case for roundabouts is when increasing traffic indicates a need for a 4-way stop and/or signalized upgrade… in terms of replacing existing.. probably a wash in terms of $$ only and not counting injuries/lives lost.

  14. You are missing the point entirely, Larry. It makes no difference how much better a roundabout is than a traffic light, if there is ANYTHING else that saves lives more cheaply.

    The e burg roundabouts were put in to replacement an existing signal. Three roundabouts replaced one signal, and the triangle. Wasted a substantial piece of open space. Likewise in oak bluffs the project is to replace an existing light.

    Roundabouts are a fad, Being pursued with good reason, but lousy analysis thereof.

    Like

    I am not arguing the point you are making, because it is moot.

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