Lesson plan
Warning triangle
A warning triangle is, together with warning lights, used in order to secure a traffic accident site. The legal rules in the individual states partly order a warning triangle to be brought in the vehicle (in Germany according to § 53a StVZO). The warning triangle consists of three reflective beams, similar to a cat's eye, and a stable foot. Except from this form, which is prescribed in road traffic, there are also collapsible signals or triangles, used by emergency services, but also for short road closures by other firms with workers in the road, perhaps gasworks or power plants. Collapsible signals also have further inscriptions, as the example photo shows. As they are collapsible, they need smaller space in vehicles than fixed boards.
Article summary
A warning triangle is, together with warning lights, used in order to secure a traffic accident site. The legal rules in the individual states partly order a warning triangle to be brought in the vehicle (in Germany according to § 53a StVZO). The warning triangle consists of three reflective beams, similar to a cat's eye, and a stable foot. Except from this form, which is prescribed in road traffic, there are also collapsible signals or triangles, used by emergency services, but also for short road closures by other firms with workers in the road, perhaps gasworks or power plants. Collapsible signals also have further inscriptions, as the example photo shows. As they are collapsible, they need smaller space in vehicles than fixed boards.
Key claims
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.