alt Hacker NewsSpeeding is a special case, because it's unclear what the lawmakers, road designers, and police intend. When the speed limit is 65 mph, do they actually intend for everyone to go no faster? I don't think so. I think the lawmakers, if driving in traffic, want people to go a bit faster. Same with the police. And I think the road designers design the roads knowing most people will speed.
I want to follow the law. But when it comes to speeding, it's hard for me to follow the letter of the law, because all the parties involved in creating and enforcing the law don't want me to follow the letter of the law. So I instead follow the intent of the law, and speed up to 9mph. When Google Maps pops up a "police ahead" warning, I don't slow down at all, because I'm following the intent of the law, and that's what police around where I live enforce. If I'm driving in other areas of the country, I'm less certain what police want, so I'll be more likely to follow the letter of the law.
If there was automated strict enforcement of speeding, then it would be clear to me that the letter of the law is the intent, so I would gladly obey the letter of the law. There would certainly need to be a transition period with clear warnings that in the future, the letter of the law will be enforced, instead of the current status of something looser.
Replies
> When the speed limit is 65 mph, do they actually intend for everyone to go no faster? I don't think so.
Where is this supposed ambiguity coming from?
The purpose of a system is what it does. In Australia, they want you to go 50. In the USA, they want a reason to fine you.
Many speed limits and policies were established in an era of fewer cars, but also much less capable cars with fewer safety features - many speed limits were established before the adoption of ABS, stability control and airbags, and more recent innovations in lane-keeping and adaptive cruise control.
Modern cars may be capable of travelling at greater speeds with greater safety, but there's a more recent recognition of the increase in emissions pollution from increased speed. Speed-limits typically remain grandfathered in at their original value (which may have been set 30, 40, 50 years ago), regardless of the change in context.
Then there are some pecularities such as the UK default of 60mph for a single-track road, but if you were to try that in many rural locations (think Cornwall, Scotland, Wales) you would likely find yourself upside-down in a ditch.
This post highlights the absurdity of some of the limits!
https://www.reddit.com/r/CasualUK/comments/1dng5z9/genuinely...
The UK NPCC (National Police Chief's Council) have a published policy where enforcement effectively starts at 10% +2mph over the speed-limit (whilst allowing officers to use individual discretion if they feel there are aggravating factors).
https://library.college.police.uk/docs/NPCC/Speed-enforcemen... [PDF]