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Electric car for £9500?

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switchabl:

--- Quote from: coppice on October 07, 2023, 04:42:00 pm ---I saw a documentary where they followed A&E (ER in the US) statistics over several decades, looking at the ups and downs of traffic accident injuries as various things changed. Seat belt laws dropped the injury rate, then it climbed back up. Each time injuries were suppressed by some change, they climbed back to the previous level within a year or two. The puzzle is what makes them always return to a similar level? People aren't tracking the details of what happens, yet somehow as a group arrive back at the old injury rate.

--- End quote ---

Part of that may just be increase in traffic/distance travelled overall? Unless that is already accounted for.

In Germany, I am not sure that this is true at all (the 1990-91 jump is because earlier years do not include East Germany):
https://www.destatis.de/EN/Themes/Society-Environment/Traffic-Accidents/_Graphic/_Interactive/traffic-accidents-persons-killed-year.html?nn=24088
I'll admit that it is a bit difficult to judge the impact of single measures versus the overall downward trend (safer cars? better healthcare?).

nctnico:

--- Quote from: switchabl on October 07, 2023, 07:02:44 pm ---
--- Quote from: coppice on October 07, 2023, 04:42:00 pm ---I saw a documentary where they followed A&E (ER in the US) statistics over several decades, looking at the ups and downs of traffic accident injuries as various things changed. Seat belt laws dropped the injury rate, then it climbed back up. Each time injuries were suppressed by some change, they climbed back to the previous level within a year or two. The puzzle is what makes them always return to a similar level? People aren't tracking the details of what happens, yet somehow as a group arrive back at the old injury rate.

--- End quote ---

Part of that may just be increase in traffic/distance travelled overall? Unless that is already accounted for.

In Germany, I am not sure that this is true at all (the 1990-91 jump is because earlier years do not include East Germany):
https://www.destatis.de/EN/Themes/Society-Environment/Traffic-Accidents/_Graphic/_Interactive/traffic-accidents-persons-killed-year.html?nn=24088
I'll admit that it is a bit difficult to judge the impact of single measures versus the overall downward trend (safer cars? better healthcare?).

--- End quote ---
You always have to include the distance travelled in these kind of stats so you can say accidents per km travelled to draw any meaningfull conclusion.

TimFox:

--- Quote from: switchabl on October 07, 2023, 07:02:44 pm ---
--- Quote from: coppice on October 07, 2023, 04:42:00 pm ---I saw a documentary where they followed A&E (ER in the US) statistics over several decades, looking at the ups and downs of traffic accident injuries as various things changed. Seat belt laws dropped the injury rate, then it climbed back up. Each time injuries were suppressed by some change, they climbed back to the previous level within a year or two. The puzzle is what makes them always return to a similar level? People aren't tracking the details of what happens, yet somehow as a group arrive back at the old injury rate.

--- End quote ---

Part of that may just be increase in traffic/distance travelled overall? Unless that is already accounted for.

In Germany, I am not sure that this is true at all (the 1990-91 jump is because earlier years do not include East Germany):
https://www.destatis.de/EN/Themes/Society-Environment/Traffic-Accidents/_Graphic/_Interactive/traffic-accidents-persons-killed-year.html?nn=24088
I'll admit that it is a bit difficult to judge the impact of single measures versus the overall downward trend (safer cars? better healthcare?).

--- End quote ---

In the US, traffic fatalities increased while miles driven decreased during the Covid shutdowns.
https://www.gao.gov/blog/during-covid-19-road-fatalities-increased-and-transit-ridership-dipped

An excerpt from that report:  "Why might this be happening? It’s not clear yet why there have been more fatalities on the road over the past two years. According to preliminary research by NHTSA, people who continued to drive during the pandemic may have engaged in riskier behavior including speeding, failure to wear seat belts, and driving under the influence of alcohol or other drugs."

Another possibility is that the highways and streets were emptier, and individual drivers interpreted that as license to speed.
Most reports indicate that although accidents decreased, the increased speed involved increased the number of fatalities.

Another theory is that "vaccine-hesitant" drivers were disproportionately involved in fatal crashes.
https://www.amjmed.com/article/S0002-9343(22)00822-1/fulltext

I remember that shortly after the shutdown in Illinois, there was a spectacular crash in Chicago during icy conditions in April of 2020, involving 50 vehicles, probably exacerbated by "empty" roadway.

tggzzz:

--- Quote from: Siwastaja on October 07, 2023, 04:12:46 pm ---I would approve systems which use sensor fusion where vision is an assisting factor, but use real distance sensing as well, e.g. ultrasonic or laser time-of-flight / LIDAR.

--- End quote ---

What's the peak and mean LIDAR output power? How does that compare to eye-safe limits/

The latter must include considering failure modes, e.g. an equivalent to the "car wouldn't slow down" with the error log showing thousands of errors.

tom66:
Just on the way back from London my ID.3 perceived "something" (I've no idea what) on the M25 as a 100 mph speed limit sign and set the ACC to 100 mph.  I would have thought the software would be smart enough to know the maximum legal limits for certain countries...

I am tempted to attach an OBD11 and code out a lot of these "safety" functions, they're not ready for prime time. The worst one is lane centering on badly marked rural roads, it likes to ditchfind, so you have to be quite firm with the steering wheel to override it.

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