<p><a href="https://www.technologyreview.com/s/530276/hidden-obstacles-for-googles-self-driving-cars/" rel="nofollow noreferrer">https://www.technologyreview.com/s/530276/hidden-obstacles-for-googles-self-driving-cars/</a></p>

<blockquote>
  <p>Google’s cars can detect and respond to stop signs that aren't on its map, a feature that was introduced to deal with temporary signs used at construction sites. But in a complex situation like at an unmapped four-way stop the car might fall back to slow, extra cautious driving to avoid making a mistake.</p>
</blockquote>

<p>It's highly probable they would slow down with current technology, as they can detect temporary signs and are designed to use slow speed in complex cases.</p>

<p>If it was a true temporary sign (e.g. road repair), how can it make the distinction? It probably would be worse to ignore a slow down sign than slow down at a fake one.</p>

<p>IMHO, the problem there is with the joke in the first place, as some humans might slow down too.</p>

CC BY-SA 4.0
2017-01-23T14:14:33.037Z
2019-06-20T15:29:57.640Z
2019-06-20T15:29:57.640Z
satibel
<p>I was wondering what will happen when somebody places a fake speedsign, of 10 miles per hour on a high way. Will a autonomous car slow down? Is this a current issue of autonomous cars? </p>

<object-recognition><autonomous-vehicles><ai-security><ai-safety>
What will happen when you place a fake speedsign on a highway?
Eddy
# What will happen when you place a fake speedsign on a highway?

(Asked by: username_0 on 2017-01-23)

I was wondering what will happen when somebody places a fake speedsign, of 10 miles per hour on a high way. Will a autonomous car slow down? Is this a current issue of autonomous cars?

**Tags:** object-recognition, autonomous-vehicles, ai-security, ai-safety


---

## 1 answers

### Answer by username_1 on 2017-01-23. Score: 6 | Accepted answer

<https://www.technologyreview.com/s/530276/hidden-obstacles-for-googles-self-driving-cars/>

> Google’s cars can detect and respond to stop signs that aren't on its map, a feature that was introduced to deal with temporary signs used at construction sites. But in a complex situation like at an unmapped four-way stop the car might fall back to slow, extra cautious driving to avoid making a mistake.

It's highly probable they would slow down with current technology, as they can detect temporary signs and are designed to use slow speed in complex cases.

If it was a true temporary sign (e.g. road repair), how can it make the distinction? It probably would be worse to ignore a slow down sign than slow down at a fake one.

IMHO, the problem there is with the joke in the first place, as some humans might slow down too.


---

