
Why this British crossroads was so dangerous
About this video
Tom Scott explains why Ipley Cross in England's New Forest was one of Britain's most dangerous junctions. The angled crossroads lets a car's A-pillar hide approaching traffic and cyclists because there is no relative motion in the driver's view.
Why it appears in the archive
Used as the go-to visual demonstration of A-pillar blind spots and badly designed junctions.
AI-generated summary and labels from the source dataset; verify important details against the video. Source & credits.
From the Hacker News discussion
The Tom Scott video has a good animation on this: [VIDEO] Because of the layout of the junction the cars are actually approaching from behind the cyclists.
Read original comment ↗The Wired reporting is based on Bez's article on Singletrack (as stated): [LINK] Tom Scott made a good complementary video about this: [VIDEO] It's already fixed just last month: [LINK] and [LINK]
Read original comment ↗Tom Scott has a good video for anyone looking for a visual of this phenomenon: [VIDEO] He shows off a rural (and thankfully now fixed) crossroads in the UK with seemingly great visibility and an unusually high rate of cyclist fatalities - the roads are at such an angle that any reckless driving speed can align with a reasonable cycling speed such that the driver's door pillar can block visibility of a cyclist with right of way right up to the point of impact - and it's compounded by the fact that the car is necessarily approaching from behind the cyclist, so a passing cyclist will be unaware of the danger possibly until they get hit. Of course if drivers in the area actually followed the stop signs no one would get hit - but if you watch the video in a five minute period genuinely only about half of the cars passing through actually come to a complete stop at the stop sign. You need more than signage and quietly hoping that people to do the right thing.
Read original comment ↗For a particularly dramatic example of this, Tom Scott made a video about an intersection in the UK that's poorly designed for visibility: [VIDEO]
Read original comment ↗Sounds to me like cars shouldn't be allowed to drive where pedestrians travel, if they can't really avoid driving people over. Edit: This Tom Scott video shows how a cyclist can be perfectly occluded by the A-pillar while both are moving [VIDEO]
Read original comment ↗> The angles we were converging at meant that he basically disappeared into the background because there was no relative motion. This effect is demonstrated in this video about a particularly dangerous crossing in the UK: [VIDEO]
Read original comment ↗The blind spots in the article are from the A pillar, which isn’t addressed by rear view mirrors. The momentum would tend toward this being solved by sensors/computer vision, but maybe chip shortages have curtailed that. Tom Scott presented an interesting example of A pillar blind spots causing problems: [VIDEO]
Read original comment ↗this article seems to have some actual pictures: [LINK] the previous configuration as shown on the satellite image looks a lot like the intersection Tom Scott made a video about, where the intersecting road is angled to keep cross-traffic hidden behind a car's a-pillar. [VIDEO]
Read original comment ↗