So, why don’t traffic signs work like they should? Many reasons are likely at play. Marc Green, in his article The Psychology of Warnings says compliance with warning signs involves the driver making a cost-benefit analysis, where he or she balances the following factors:

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Police issue X26 TASER device with cartridge installed Raysun X-1, a multi ... The first Taser model that was offered for sale, called the TASER Public ...

Jul 22, 2014 — He also said that "angled drive stun" - where the officer fires the weapon with a live cartridge installed, and then holds the Taser against a ...

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Executive Order 14074, “Advancing Effective, Accountable Policing and Criminal Justice Practices to Enhance Public Trust and Public Safety,” requires that federal law enforcement agencies publicly post body worn camera policies.

Jul 16, 2020 — If the NMI induced by the TASER 7™ is more robust than it is with the TASER X2™, then this may elevate the risk of skull and other bony injuries ...

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Surprisingly little work has been put into studying the effectiveness of traffic signs, considering how they can be seen on every highway or busy city street. What studies have been done have not shown signage has a strong effect on reducing accidents in dangerous areas. In fact, many experts believe that the main purpose of traffic warning signs is not to reduce accidents but to provide liability protection for the government that posts them.

Have you seen any particularly effective or ineffective traffic signs? If so, let us know in the comment section. And if you have questions about labelling for workplace or transportation safety, contact ICC Compliance Center at 1.888.442.9628 (USA) or 1.888.977.4834 (Canada).

Barbara Foster graduated from Dalhousie University with a Master’s degree in Chemistry and a Bachelor’s degree in Education. As one of ICC Compliance Center’s most senior employees, she has worked in the Toronto office for the past three decades as a Regulatory Affairs Specialist and Trainer. She is fluent in various US, Canadian, and international regulations involving transportation, including TDG, 49 CFR, ICAO, IMDG, and the ADR/RID. She also specializes in the hazard communication standards of OSHA, WHMIS, CCCR, and the Globally Harmonized System for Classification and Labelling (GHS). Barbara is the author of ICC’s TDG Clear Language Driver and Handler’s Guide. Currently, she is a participant on the Canadian General Standards Board committee where she creates training standards for transportation of dangerous goods in Canada and is a past Chair of the Dangerous Goods Advisory Council.

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Apparently, the answer is somewhere between “not great” and “we’re not sure.” There’s little research on the effectiveness of highway traffic signs and what there is shows that a surprising lack of effectiveness. For example, the Minnesota Department of Transportation has admitted:

There are many ways safety experts are now working to determine what psychological factors make people decide to obey traffic signs. For example, the effectiveness of signs can be diluted if they appear everywhere, so signs may be posted only where significant hazards truly exist. Green mentions

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Each driver will evaluate these two factors and make a (perhaps unconscious) decision to obey the sign or to ignore it and risk something nasty happening down the road.

The sign provides information about Kimba and its location being halfway between Sydney and Perth. Halfway Sign ...

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“Signs that alert drivers to infrequent encounters or possible situations–such as deer crossing or children playing—do not have a consistent impact on driver behavior. Widespread use or misuse of warning signs reduces their overall effectiveness.”

A few years ago, someone wrote an irate letter to his local newspaper about the deer warning signs put up on a local highway. He couldn’t understand why they were always on busy highways. Wouldn’t it reduce accidents if the deer were told to cross smaller roads instead?

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“People have unconsciously learned the general rule that signs and signals grow in size and vividness with their importance, presumably so that they will be more readily seen. Viewers will then likely interpret warnings that are small, faint, or located peripherally as signaling lower risk.”

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The Department of Justice (DOJ) Office of the Inspector General (OIG) body worn camera policies are posted at the below link.

These factors apply to all drivers, but they also are an important issue for workplace and consumer safety labels. Designers of OSHA or WHMIS labels must, of course, comply with the regulations, but understanding the psychology of safety warnings is also important when trying to create an effective label design. The label must be able to persuade the reader that compliance is really the most cost-beneficial response. By studying what we’ve learned about highway signs, we can learn what psychological nuances improve the likelihood that users will comply with the label.

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Jun 7, 2024 — In addition to the safeguards and reduced voltage, the TASER 10 has a built-in function to activate any body-worn cameras within 30 feet when ...

We may laugh, but the story does bring up an interesting point. Just how effective are traffic warning signs? They can be found wherever we travel, from the common “sharp curve ahead” to the more esoteric, such as the “moose warning” signs in Newfoundland. Highway safety departments consider them an important part of improving driving safety. But how well do they work?

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“[D]rivers routinely see signs warning of deer crossings (in the United States) or elephant crossings (in Sri Lanka) or camel signs (in Tunisia). It is difficult to say what is going on in the mind of a driver whenever he or she sees a deer or elephant or camel crossing sign, but studies have shown that most drivers do not change their speed at all.”

Fortunately, OSHA and WHMIS labels include precautionary phrases that specifically instruct the user in what to do to ensure safety, a feature sometimes lacking in traffic signs. For example, when confronted by a “falling rocks” sign, what should a driver do? Avoid the area? Wear a hard hat when going through the zone? And I was always perplexed on how drivers transversing a typical single-lane Scottish highway were expected to respond to the ominous warning on blind curves – “Oncoming traffic may be in centre of road” – that gave drivers no suggestion for how to negotiate the curve safely.