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Joined 1 year ago
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Cake day: October 4th, 2023

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  • If you’ve got 14 billion years, a theft takes a minute, then you need 53 recursion levels of binary search to find the moment of the theft. (14 billion years can be split into about 7.3e15 1-minute segments, 53 levels of binary search allow you to search through 9e15 segments)

    That means OP assumed that it’d take 1 minute to decide whether at a certain still frame the theft had already occured or not, to compute the new offset to seek to, and the time it’d take to actually seek the tape to that point.

    Not an unreasonable assumption, but a very conservative estimate. Assuming the footage is on an HDD and you’ve got an automated system for binary search, I’d actually assume it’d take 5 seconds for each step, meaning finding a 1min theft on 14 billion years of footage would take 5 minutes.




  • First off, city streets are by law limited to 50km/h (30mph) in Germany unless the road is physically blocked off from pedestrian access and is designated a motorway. And even that speed is only allowed for major thoroughfares, most city streets are limited to 30km/h (18mph), and many cities are currently arguing for banning 50km/h on city streets entirely.

    Streets faster than that need to be physically separated, well-lit, need to have an additional lane or frequent additional locations to park broken down vehicles and need significant setbacks so you can see potential obstructions entering the road early enough to brake in time.

    So what I’m taking from this is that the road design where you live is dangerous and substandard.

    Now, to the personal appeal:

    I did take a defensive driving course before I even started driver’s ed, and it was actually the reason I decided not to get a car. Nowadays I do everything — including weekly grocery runs — by bicycle instead.

    The average speed in cities is 15-20km/h, primarily caused due to traffic jams and waiting times at stoplights. I can achieve or beat those speeds on a bicycle just as well, without the stakes being as high. If I make a mistake as a driver, it’s going to cost lives. If I make a mistake as a bicyclist, no one’s going to die. And considering the environmental footprint as well as the monetary costs in terms of road tax, fuel prices and maintenance, it’s definitely worth it.

    Even if sometimes, people try to kill me by overtaking me far too close while speeding.



  • Actually, in EU countries the law explicitly says you have to drive slow enough to react to unexpected changes on the road. If you as a driver hit something or someone, you are automatically at fault because you violated that law. There is an incredibly high burden of proof required to not be at fault as a driver.

    But that’s usually not an issue, because road planners are only allowed to set speed limits that are low enough that drivers can actually react to unexpected changes. Which is why e.g. the Autobahn has a separate lane for broken down vehicles and significant setbacks and green areas to both sides of the road so you can see from a long distance away if something is in the road.


  • If you actually think about it, it’s absolutely makes sense. The Autobahn has additional stopping lanes for broken down cars and several meters of grass to each side, which means you can safely drive hundreds of kilometers an hour while still being able to see obstructions early enough to brake in time.

    Slower motorways have smaller setbacks, but still enough to keep their speeds.

    City streets where you can’t see people entering the road in time to brake usually have relatively low speed limits to reduce the braking distance as well as the damage caused by a collision.

    But if the visibility or braking distance are affected due to weather or broken streetlamps, it’s up to you to slow down accordingly. But even for situations like that traffic planners usually add additional signs, it’s common to see roads with signs that say

    /❄️\
    (60)
    

    to warn people to drive slower when the road is freezing or signs that say

    /🦌\
    (50)
    [400m]
    

    to warn of crossing animals in the next 400m and set a lower speed limit.

    The same obviously applies when it’s not crossing deer but crossing pedestrians.


  • The speed limit isn’t a suggested speed, it’s an absolute maximum (excluding motorways with a minimum of 60km/h). If the road is frozen over you can’t drive the speed limit either, the same applies when it’s slippery due to rain or leaves or when the lights are off.

    You always need to be able to react to sudden movement, no matter if it’s a pedestrian crossing the street, a motorist leaving their own driveway or even a trash can rolling into the road. It should be in your own best interest to avoid accidents.

    The entitled attitude you ascribe to the overtaking drivers but also display yourself is just going to cause problems for everyone. Trying to shave a few seconds off of your commute by speeding in dark areas isn’t going to get you home any faster, all you’re doing is increasing your own stress level and risking someone’s life.

    A little bit of respect on the road would go a long way to improve everyone’s experience on the road.