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Why would a car brake if a ride is behind it?

 
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newMan




Joined: 07 Apr 2010
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PostPosted: Thu Feb 22, 2018 10:10 am    Post subject: Why would a car brake if a ride is behind it? Reply with quote

http://www.cyclingnews.com/news/abu-dhabi-tour-organisers-blame-automatic-brake-sensor-for-cavendish-crash/

I can't make sense of this. Why would the auto brake activate when a rider/car approaches from behind?
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FoulOleRon




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PostPosted: Thu Feb 22, 2018 10:14 am    Post subject: Re: Why would a car brake if a ride is behind it? Reply with quote

newMan wrote:
http://www.cyclingnews.com/news/abu-dhabi-tour-organisers-blame-automatic-brake-sensor-for-cavendish-crash/

I can't make sense of this. Why would the auto brake activate when a rider/car approaches from behind?


I could maybe understand if there were cyclists at the side or being passed, but agree, it's a little counter intuitive.
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jibberjim




Joined: 15 Aug 2008
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PostPosted: Thu Feb 22, 2018 10:56 am    Post subject: Re: Why would a car brake if a ride is behind it? Reply with quote

newMan wrote:
http://www.cyclingnews.com/news/abu-dhabi-tour-organisers-blame-automatic-brake-sensor-for-cavendish-crash/

I can't make sense of this. Why would the auto brake activate when a rider/car approaches from behind?


It would've been the car in front of the car that braked that caused the problem, a driver would've gone round / not braked etc. but the autobraking was excessive.
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newMan




Joined: 07 Apr 2010
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PostPosted: Thu Feb 22, 2018 11:30 am    Post subject: Re: Why would a car brake if a ride is behind it? Reply with quote

jibberjim wrote:
newMan wrote:
http://www.cyclingnews.com/news/abu-dhabi-tour-organisers-blame-automatic-brake-sensor-for-cavendish-crash/

I can't make sense of this. Why would the auto brake activate when a rider/car approaches from behind?


It would've been the car in front of the car that braked that caused the problem, a driver would've gone round / not braked etc. but the autobraking was excessive.


This was the start of the race? Normally there is only one commissioner's car that the riders have to stay behind (until the flag is dropped)?
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doug




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PostPosted: Thu Feb 22, 2018 11:37 am    Post subject: Reply with quote

https://www.youtube.com/watch?time_continue=18&v=mfwXRUDnRsw

Looks the peloton was just starting to come round the lead car when the crash happened.
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explorerJC




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PostPosted: Thu Feb 22, 2018 12:01 pm    Post subject: Reply with quote

surely you'd switch off any auto aid for this type of task...?
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jibberjim




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PostPosted: Thu Feb 22, 2018 1:18 pm    Post subject: Re: Why would a car brake if a ride is behind it? Reply with quote

newMan wrote:
This was the start of the race? Normally there is only one commissioner's car that the riders have to stay behind (until the flag is dropped)?


The video shows what it was that almost certainly caused the braking, the motorbikes... and there's a lot more than one comm car in front of the bunch, although it depends how far in front, lead car should of course be seconds ahead of the bunch in all cases.

Even in domestic #@?# level racing there's a lead car and comm 2 in front of the bunch at the roll out (and normally lead car 2 too, although that could be parked up.)
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ed_m




Joined: 15 May 2003
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PostPosted: Thu Feb 22, 2018 1:40 pm    Post subject: Reply with quote

doug wrote:
https://www.youtube.com/watch?time_continue=18&v=mfwXRUDnRsw

Looks the peloton was just starting to come round the lead car when the crash happened.


Hard to see... when it cuts to the copter shot the incident has pretty much already happened and the bikes are only just making it round the sides.

Possibly picked up one of the camera bikes coming through but they also look a fair way off. The one that's initially behind the tree with the camera held off the side perhaps ?
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