From @sjamieit.bsky.social:
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@c_9 ... and if the KSI figures *have* gone up then there's the data to drive your campaign to reinstate the speed limits.
@TimWardCam @c_9 this is about the removal speed *cameras*, the speed limits haven't changed
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@c_9 'Cos that would be the point - if removing the speed limit didn't affect the KSI figures, which is presumably what the speed limit was there for in the first place, then ... ???
@TimWardCam @c_9 what's KSI?
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@TimWardCam @c_9 what's KSI?
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@TimWardCam @c_9 this is about the removal speed *cameras*, the speed limits haven't changed
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@TimWardCam @c_9 no it doesn't
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From @sjamieit.bsky.social:
The City of Ottawa posted the raw speed data from before and after Doug Ford banned speed cameras and the effect is so obvious it's not even necessary put a line marking when that happened.
This chart shows the percentage of drivers going 15km/h or more over the posted limit.
@c_9
Ah. Obviously it raises one question, how is data collected.Before is easy, the speed cameras measure the speed of everything that passes them, even the cats that go slower than the limit.
But afterwards? How was the data collected?
Sorry the data scientist in me wonders.
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@c_9
Ah. Obviously it raises one question, how is data collected.Before is easy, the speed cameras measure the speed of everything that passes them, even the cats that go slower than the limit.
But afterwards? How was the data collected?
Sorry the data scientist in me wonders.
@yacc143 I was wondering this too!
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From @sjamieit.bsky.social:
The City of Ottawa posted the raw speed data from before and after Doug Ford banned speed cameras and the effect is so obvious it's not even necessary put a line marking when that happened.
This chart shows the percentage of drivers going 15km/h or more over the posted limit.
They're not speed cameras, they're surveillance tools that can be used as speed cameras.
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@TimWardCam @c_9 no it doesn't
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@clickhere @andymor @c_9 That's likely to be how the transport engineers see it - the priority for spending on the roads is to reduce KSI. Councillors don't of course have to follow this advice and can spend on political projects instead.
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@yacc143 I was wondering this too!
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@nirak @yacc143 Actually this page explains a bit, it’s measuring everything and reporting the averages. https://open.ottawa.ca/datasets/52f34797978c44c1820b8b2d7a4ae3ed
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From @sjamieit.bsky.social:
The City of Ottawa posted the raw speed data from before and after Doug Ford banned speed cameras and the effect is so obvious it's not even necessary put a line marking when that happened.
This chart shows the percentage of drivers going 15km/h or more over the posted limit.
Off-topic, are you aware that the owner/operator of your mastodon instance is accused of defrauding the Inglewood Community League in Edmonton?
Edmonton's Inglewood community league sues past treasurer for $280K | CBC News
Out $280,000, the Inglewood community league says it has reported missing money to the police. Now, it’s suing its former treasurer.
CBC (www.cbc.ca)
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@c_9 What's the correlation with the KSI figures?
@TimWardCam @c_9 I want to know more than KSIs ...
In my little village in France many cars and trucks are going at >50kph
No child is allowed by their parents to roam the village on their bike with friends.
I'm wondering if their is a link between those two.Making a car centric world have huge social consequences
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From @sjamieit.bsky.social:
The City of Ottawa posted the raw speed data from before and after Doug Ford banned speed cameras and the effect is so obvious it's not even necessary put a line marking when that happened.
This chart shows the percentage of drivers going 15km/h or more over the posted limit.
@c_9 this one is for @notjustbikes to go on a rant about his favorite politician
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@TimWardCam @c_9 I want to know more than KSIs ...
In my little village in France many cars and trucks are going at >50kph
No child is allowed by their parents to roam the village on their bike with friends.
I'm wondering if their is a link between those two.Making a car centric world have huge social consequences
@benjamin @c_9 Yes you do, but council officers in the UK at least are exceedingly reluctant to do anything that might *increase* KSIs. So they would need very serious persuading that there would be no impact on KSIs before removing speed limits or, equivalently in practice, speed limit enforcement.
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From @sjamieit.bsky.social:
The City of Ottawa posted the raw speed data from before and after Doug Ford banned speed cameras and the effect is so obvious it's not even necessary put a line marking when that happened.
This chart shows the percentage of drivers going 15km/h or more over the posted limit.
@c_9
So, the speed cameras are there as a workaround for badly designed roads.If you design the road for the speed you want people to drive, most people aren't going to drive faster. Because doing so *feels* unsafe. Where as if you design a road that feels like the German Autobahn, people are going to drive fast whether that's actually safe or not.
Build better roads, don't fine people for using the road as designed.
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@c_9
So, the speed cameras are there as a workaround for badly designed roads.If you design the road for the speed you want people to drive, most people aren't going to drive faster. Because doing so *feels* unsafe. Where as if you design a road that feels like the German Autobahn, people are going to drive fast whether that's actually safe or not.
Build better roads, don't fine people for using the road as designed.
@leeloo Correct. This is how North America was and continues to be built.
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@benjamin @c_9 Yes you do, but council officers in the UK at least are exceedingly reluctant to do anything that might *increase* KSIs. So they would need very serious persuading that there would be no impact on KSIs before removing speed limits or, equivalently in practice, speed limit enforcement.
@TimWardCam @benjamin @c_9 you say that like it’s a bad thing, and the suggestion that the only benefit to lower speeds is reducing people being killed or seriously injured is absurd.
Our town moved to mostly 20 mph limits at the start of 2025 and road noise is significantly reduced, and walking my kids to school *feels* massively more safe and is generally far more pleasant.
Pedestrians managing not to be killed or seriously injured by idiots in 2 ton machines feels like a low bar.
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@TimWardCam @benjamin @c_9 you say that like it’s a bad thing, and the suggestion that the only benefit to lower speeds is reducing people being killed or seriously injured is absurd.
Our town moved to mostly 20 mph limits at the start of 2025 and road noise is significantly reduced, and walking my kids to school *feels* massively more safe and is generally far more pleasant.
Pedestrians managing not to be killed or seriously injured by idiots in 2 ton machines feels like a low bar.
@matthewbadger @benjamin @c_9 The relationship between elected councillors and the paid staff can be quite complex, that was just one detail.
For my own contribution, take a look at #Cambridge. The city-wide 20mph scheme was my project.
