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trainrover
07-04-2008, 12:06 PM
Time to call a halt to stop signs?
Traffic signals and speed limits stop us thinking and so we drive less safely, prof says
Jim Kenzie
Toronto Star

Jul 04, 2008


The Atlantic Monthly is not a car magazine. It's all about politics, society, literature, the arts, general interest. Used to have short fiction and great cryptic crossword puzzles too. Sadly, both now gone.

I have been reading it cover-to-cover for, oh, I dunno, maybe 30 years, and every time I finish an article, I think to myself, "Yeah, I knew that.''

The pieces are always so well-written, the information seems lodged in your brain as if it was always there.

The Atlantic Monthly doesn't often have articles on automobiles, but when they do, they really nail it. A piece some years ago about futurist/environmentalist Amory Lovins and his "hypercars'' changed my entire way of thinking about the future of the automobile.

But I now have a new favourite writer. His name is John Staddon, and he is not, apparently, a car guy at all.

He's a professor of psychology and brain science at Duke University in North Carolina, and an honorary visiting professor at the University of York in England.

He has a story in the current (July/August) issue entitled "Distracting Miss Daisy," which I link to in my blog at Wheels.ca.

The secondary headline – the sentence right below the title – is, "Why stop signs and speed limits endanger Americans."

You just know I'm gonna love this guy.

Staddon rails about the proliferation of stop signs on American roads (virtually everything he writes about pertains to Canada too). Stop signs disrupt traffic flow, and harm the environment, what with unnecessary idling and stop-start driving.

Yet they don't make our roads any safer.

He reserves special condemnation for four-way stop signs. This plague has reached such proportions that many intersections that do not have four-way stops now add another sign: "Cross traffic does not stop.''

(That one always makes me wonder if good-natured traffic does stop.)

Staddon's point is that too many signs of all kinds not only distract drivers from actually looking at the road – sort of where you'd think they ought to be looking – but also cause drivers to adapt to the driving environment in "profoundly unhealthy ways.''

For instance, all those stop signs teach drivers to be less observant of the traffic flow – as long as they just obey the sign and stop, nothing else matters. If someone runs the stop sign in the crossing direction, it's their fault.

Yeah, but you're just as dead.

Staddon adds, "Speed limits in the U.S. are perhaps a more severe safety hazard than stop signs.''

No, really, I did not write this story.

He notes that speed limits on this side of the ocean are usually determined to reflect the worst possible conditions, yet are typically enforced in the best possible conditions, when higher speeds are indeed safe as church.

Which, of course, explains why said enforcement has nothing at all to do with traffic safety, as regular readers (except certain subsets of our police departments) know perfectly well.

Staddon says he is not necessarily suggesting a traffic free-for-all, although several communities in The Netherlands, England and even Florida (West Palm Beach) have done just that, with fantastic results – pedestrian casualties down by 40 per cent or more, for example.

Why? Because removing the signs, sidewalks, traffic lights, etc., forces drivers and pedestrians to take personal responsibility for their own safety.

Guess what? They do.

It's like I always say about raising children: You don't get the behaviour you demand; you get the behaviour you expect.

We expect our drivers to be stupid, and they seldom disappoint.

Expect them to be intelligent, and, surprise, surprise ...

Staddon recognizes that his proposals may be too dramatic for widespread adoption in North America. Instead, the England-raised professor (a brain scientist, remember) suggests we adopt just some of the U.K.'s policies, such as:

Replacing most stop signs with yields, indicated in England by a dotted line across the intersection. Note: painted on the road, where you're supposed to be looking, not off in the bushes somewhere, like so many stop signs.

Roundabouts instead of traffic lights (yay!). Even when installed in the U.S., roundabouts reduce collisions by about 40 per cent. (Why has there been a single conventional traffic-light intersection built here in the last 40 years? Why isn't somebody suing somebody?)

Realistic and consistent speed limits that reflect the type of road, rather than some local politicians' or police officers' whims.

Staddon has proffered these solutions to many audiences in the U.S, and usually gets the same response: "Couldn't be done here."

To which he replies, quite reasonably in my view, "Why not?''

He notes that they generally drive faster in England, on narrower, twistier, generally less-safe roads, in smaller, generally less-crash-proof cars.

Yet as of 2003, statistics show that per vehicle-mile travelled, fatalities are 36 per cent higher in the U.S. than in the U.K.

Thirty-six per cent!

Now, there are a few things Staddon doesn't mention that might influence these statistics, both positively and negatively.

First, seatbelt wearing rates in the U.S. remain stuck in the low-70 per cent range, while in England (and Canada) they run in the low- to mid-90 per cent range.

That alone should be enough to explain why we in Canada kill about 2,700 people on our roads each year versus over 40,000 in the U.S., when the numbers should be closer to the 10-times factor of our respective populations.

This probably explains a lot of the differential between the U.S. and the U.K. too.

Second, England is a more densely populated country than the U.S. (or Canada), and medical assistance may be more rapidly deployed there than here.

Trauma specialists refer to the "golden hour'' – if treatment doesn't begin within an hour of the impact, survival rates plummet. Emergency care might get to most traffic victims quicker there than here.

Third, is there something special about U.K. drivers?

Well, yes. They are vastly better trained and more stringently licenced than drivers over here. Which again, in my view, suggests another reason why their numbers are better than ours.

But is there anything inherent in British people that might make them better drivers? Does a steady diet of fish 'n' chips, chip butties and tea (or, more likely these days, curry) have an influence?

Not so's anybody's proven.

It's the old demand/expect thing again. The British expect their drivers to learn how to drive before getting a licence, and so they do.

Now, not much, if any, of this will be unfamiliar to regular readers, not even those aforementioned subsets of the police departments (I know you're out there).

I have been saying all of the above for most of my 25 years in this business.

But of course I am merely a speed-crazed car-freak lunatic (or so I have been characterized by some).

John Staddon is a professor, a brain scientist, and an expert on human adaptive behaviour, fer cryin' out loud.

And, he is writing in one of the most august publications in the world.

Maybe the powers-that-be will listen to him.

This month's Atlantic Monthly also has a great article on General Motors' upcoming Chevrolet Volt plug-in hybrid car. Another great read.

Wheels' chief auto correspondent Jim Kenzie can be reached at jim@jimkenzie.com

Jim Prower
07-04-2008, 01:47 PM
I say this as an automobile enthusiast.

This. Man. Is. Insane.

1: Have you forgotten that you live in the realm of the Speed Camera? You keep blathering on about unlimited speed limits when yours are more heavily enforced.

2: Roundabouts...yes. let's give our stupid kids more opportunities to try drifting. I don't really see the advantage: I've got one in my town (called the "Square") and I really don't call it much of a safe place. It's really dicey getting in and out of there. As for yield signs: what do you think our drivers treat stop signs as?

3: I'd be all for more stringent testing. It should be that your license should be a "License to learn," not just printed out for any halfwit who gets behind the wheel. I'd like to suggest the switch to Manual transmissions in Driver's Ed, as well as purpose-built learning centers: could be no more than an abandoned lot with a large expanse of concrete, and some Chevrolet Aveos. Simply set aside a section with sprinlkers for wet handling.

trainrover
07-04-2008, 02:39 PM
^^ Me, just by his writing style, I took the T'o-Star journalist to be some automobiling US resident...

jtr1962
07-04-2008, 05:29 PM
I don't know about replacing stop signs with roundabouts, but it is true that speed limits in the US are far too low. There was a time when they were set by traffic engineers based on sound principles which worked well for years. The general rule was to use the 85th percentile for local roads, the 90th percentile for two-lane highways, and the 95th percentile for limited-access highways, all rounded up to the nearest 5 mph . Enter the 1970s and the national 55 mph speed limit. Even once that limit was lifted, states were already in the habit of legislating speed limits. The legislated limits were of course designed to bring in more speeding ticket revenue. Indeed, many small towns exist solely because of such revenue. The traffic engineers were no longer in the picture. Nowadays speed limits are often at the 5th or 10th percentile, meaning 90-95% of drivers routinely violate them. Since drivers see they can safety break this traffic law, their behavoir carries over to other traffic laws, such as not stopping at red lights, where violation is defintely not safe. The end result is a country of unsafe drivers who routinely ignore traffic laws and common courtesy. The only way to fix it is to start putting speed limits back to where traffic engineers say they should be, with no legislated maximum. If the 95th percentile is 100 mph, then that's what the posted speed limit should be. And the limits should be reevaluated at least every 5 years. Due to improving roads and more stable cars, traffic speeds have consistently crept up about 5 mph every decade. In the 1950s 65 mph really was the 95th percentile on many Interstates. Nowadays 85 or 90 mph would likely be more appropriate on the same highways unless sharp curves made a lower limit necessary.

And I'm definitely for much more stingent licensing along with the higher speed limits. Many people shouldn't be driving at all.

Jim Prower
07-04-2008, 05:52 PM
Holy cow, 90MPH? My car tops out around there.

jtr1962
07-04-2008, 06:03 PM
Holy cow, 90MPH? My car tops out around there.
Actually, there's some real beauty where speed limits happen to be at or close to the top speed of many cars. It means that the car isn't overpowered at all, but rather has just enough power to do the job it's intended to do. That makes them a lot more like trains actually where the power is tailored to the actual conditions of the railroad and the load. I think it's kind of cool to just drive petal to the metal between exits without reaching hypersonic speeds like many of today's cars do.

BTW, what kind of car do you have? 90 mph seems really low for a top speed by today's standards. My mom's 300C tops out at 124 mph, my brother's Mark VIII at 128 mph (both electronically limited, not power limited). The Mark VIII can go past 160 mph with a different chip. Not saying these speeds would be sane under any circumstances, but I'm all for raising limits and making cars actually designed to run at or only slightly faster than these limits. They would be much more efficient than today's mostly overpowered vehicles which are effectively castrated with today's low speed limits.

Paul1953
07-04-2008, 06:06 PM
Undecided about 4-way stops, however they are usefull for those intersections with obstructed views. The ones I find useless are T intersections, with 3 way stops.

GEXRailfan
07-04-2008, 06:32 PM
Having worked as an Civil Engineering intern in a major Ontario city for the past year in the transportation division, I can say that despite the vast belief to the contrary, unwarranted all way stops have a detrimental effect on public safety. The reason being that midblock speeds between unwarranted all way stops increase dramatically as drivers are frustrated and are trying to make up for lost time wasted in slowing down (and usually not stopping).

All way stops are to be used as a means of traffic control only. The warrants used in Canada (and probably the United States as well) are as follows. A three way stop is warranted when there are a minimum of 350 vehicles entering the intersection and at least 25 % are entering from the side street in a 60 minute period. A four way stop is warranted when there are 350 vehicles entering and 35 % of vehicles enter the intersection from the side street in any 60 minute period. Determining if an intersection meets a warrant the requires a manual count of the intersection and the peak periods we use are 7:00-9:00 and 2:00-5:00.

Most of the all way stops out there do not meet the warrant and there is a great dichotomy between compliance rates (i.e. what percent of approaching vehicles actually come to a complete stop) at warranted and non warranted locations. At warranted locations the compliance rates are around 90 % because there is a high likelihood that there are multiple vehicles arriving at the same time and right of way has to be given to the proper vehicle. At unwarranted locations the compliance rates are around 10 % due to the fact that there is usually no right of way to be determined, traffic usually heavily favours the main street, and thus no complete stop.

If you want to address a speeding problem, other means of traffic calming such as curb extensions, speed humps, diverters, turning restrictions, raised intersections, etc. need to be used. Each problem needs to be addressed individually as not every measure will apply in every situation.

Erick_Cantu
07-05-2008, 04:02 AM
Actually, there's some real beauty where speed limits happen to be at or close to the top speed of many cars. It means that the car isn't overpowered at all, but rather has just enough power to do the job it's intended to do. That makes them a lot more like trains actually where the power is tailored to the actual conditions of the railroad and the load. I think it's kind of cool to just drive petal to the metal between exits without reaching hypersonic speeds like many of today's cars do.

BTW, what kind of car do you have? 90 mph seems really low for a top speed by today's standards. My mom's 300C tops out at 124 mph, my brother's Mark VIII at 128 mph (both electronically limited, not power limited). The Mark VIII can go past 160 mph with a different chip. Not saying these speeds would be sane under any circumstances, but I'm all for raising limits and making cars actually designed to run at or only slightly faster than these limits. They would be much more efficient than today's mostly overpowered vehicles which are effectively castrated with today's low speed limits.
If I recall correctly the equivalent of a 1987 Corolla. A 1987 Corolla's limit is around 97MPH on flat ground. Trust me, I know. ;)

I agree with your other post. The cops and the legislators have too much time on their hands. Maybe they need to start going after people who drive with their lights off when it's illegal or the other problems that actually make a difference. They go after the buzz words and the buzz words are drunk and speeding. A competent drunk driver is far less unsafe than an incompetent sober driver because an incompetent driver is an incompetent driver, period. I know many cops who agree. The problem is incompetent and/or stupid drivers. I passed my test in a state of dementia induced by a severe (actually, life-threatening as I found out) case of pneumonia. That's how lax the standards are.

My big rants about being on the road can be found here: http://www.eastern-va.com/forums/viewtopic.php?f=7&t=1533

(WARNING: NSFW - MY OFF TOPIC FORUM IS UNMODERATED)

rdamurphy
07-05-2008, 04:19 AM
If you happen to have the "pleasure" of driving in Mexico (not the border towns) it's sort of the way you describe it, but not nearly like South Korea was in the early 80's! There WERE no traffic lights, no stop signs, and basically, traffic was anarchy. I'm not even sure anyone had a driver's license! And ya know what? Very few accidents ever happened. People HAD to pay attention, because cars were extremely expensive (and valuable) and neither the bus companies, nor the ROK or US Armies really cared if your car got crushed beneath a 5 ton truck or a bus.

I wonder if they ever put sides on the bridges?

Robert

SD50
07-07-2008, 11:22 AM
I would guess Mr. Staddon never drove in New York, Connecticut, or Massachusetts.

The problem isn't the traffic signs or the laws- it's the drivers. And it's getting all the drivers to actually obey the laws. I've heard it said that most people think they're better drivers than they really are, and from what I see on the road every day, I'd agree with that.

As for speed limits, it's true there's a safety factor built in. From an engineering standpoint, most highways can be driven faster than the posted speed limit. But how many people on the highway actually obey these (all the while talking on the cell phone, texting, and fixing their makeup)? Raising the posted speed limit would only result in people going faster yet.

The point was made about driver training. I would highly agree with that, and if I were Dictator, driver's license exams would be much more thorough, and there would be a review test every few years when you renew your license.

We have a few roundabouts in my area (we call them "rotaries"). I don't see them as being any safer than 4-way stops, and they sure get their share of fender benders. Not any more environmentally friendly either.

But probably the most hazardous thing I see day to day is people running red traffic lights. I don't mean it just barely turned red, I mean it turned red and traffic is already moving from the intersecting road. What we need here is those "severe tire hazard" spikes to pop up out of the road when the light turns red.

So what we really need to do is adjust the drivers, not the road signs or laws. Or maybe build those "smart highways" so the cars will drive themselves, and everyone can just play with their blackberries and watch their DVD's while the car drives itself to the mall.

jtr1962
07-07-2008, 06:15 PM
Or maybe build those "smart highways" so the cars will drive themselves, and everyone can just play with their blackberries and watch their DVD's while the car drives itself to the mall.
That's really the best solution. As much as I would like stricter driving tests, given that most Americans feel a driver's license is a birthright it won't happen. And driver distractions will only increase. Leave the driving to the car. We'll all get to our destinations safer. Besides that, I've heard smart highways will eliminate traffic jams and offer higher legal speeds.

trainrover
07-08-2008, 03:22 PM
That's really the best solution.
Oh, really? I just can't imagine scenic, catenarized roadways for the life of me...

(N) America's pervy over its laughable cars.

SD50
07-08-2008, 03:37 PM
Oh, really? I just can't imagine scenic, catenarized roadways for the life of me...

(N) America's pervy over its laughable cars.


Actually, the work done on the smart highways so far uses sensors mounted IN the pavement, not on catenaries.