Speed - "In the last 5m of braking you wipe off half your speed." - Page 2
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Thread: Speed - "In the last 5m of braking you wipe off half your speed."

  1. #16
    Beer League Racer/Asshole Array SnoDragon's Avatar
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  3. #17
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    Meh.....if you'd have been going 120km/h instead of 90km/h you'd have been 300ft past the intersection before the truck even reached it.





    j/k.... good vid.

  4. #18
    Registered User Array clintP's Avatar
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    very informative and useful

    thanks

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  6. #19
    Registered User Array MrCheeky's Avatar
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    Good video and reminder. I was wondering though...reaction time is very important as well...

    I assume that the speeds in the video are in mph. If the driver's reaction time in the vehicle travelling at 60mph is just a 1/4s slower than what was portrayed in the video, then he (theoretically) goes an extra 22 feet lodging his vehicle under the trailer unit.

    Of course a slower speed will allow you more reaction time.

  7. #20
    Registered User Array StevieMac's Avatar
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    Your reaction time remains the same but the distance you cover during that reaction time obviously increases with added speed. So at a higher speed you travel a lot further before you actually get the brakes applied.

    The video is in kmh.
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  8. #21
    Moderator Array jeckyll's Avatar
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    Very interesting.

  9. #22
    Registered User Array Dr. Love's Avatar
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    Also calls into question the design of the underride guard on the semi trailer.
    I... er... fall down a lot.

  10. #23
    Moderator Array CHIA's Avatar
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    Quote Originally Posted by Dr. Love View Post
    Also calls into question the design of the underride guard on the semi trailer.
    Pretty sure that was chosen for dramatic effect.
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  11. #24
    I like traffic cones :S Array made Man's Avatar
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    Quote Originally Posted by CHIA View Post
    Pretty sure that was chosen for dramatic effect.
    +1. How often does a semi suddenly pull out in front of you like that at an intersection? Heck, can it even physically do that?



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  12. #25
    Registered User Array ctardi's Avatar
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    Quote Originally Posted by made Man View Post
    +1. How often does a semi suddenly pull out in front of you like that at an intersection? Heck, can it even physically do that?
    Ever seen a semi blow through a stop sign?

    I have.

  13. #26
    I like traffic cones :S Array made Man's Avatar
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    Quote Originally Posted by ctardi View Post
    Ever seen a semi blow through a stop sign?

    I have.
    situational awareness does a lot more than going 5kph slower.

    Should be easy to spot a semi truck barreling down a street. Unless you think that 'right of way' actually applies in the real world, it should not be an issue. Bigger vehicle always wins, and right of way does nothing when ya in a hospital... either in a bed or on a slab.



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  14. #27
    burn rubber not your soul Array ecor's Avatar
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    great vid

  15. #28
    Registered User Array ctardi's Avatar
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    Quote Originally Posted by made Man View Post
    situational awareness does a lot more than going 5kph slower.

    Should be easy to spot a semi truck barreling down a street. Unless you think that 'right of way' actually applies in the real world, it should not be an issue. Bigger vehicle always wins, and right of way does nothing when ya in a hospital... either in a bed or on a slab.

    Yes, but you can't always see every corner, especially in our nicely treed area of BC. What do you do when coming to a blind corner? Pi the angles, and SLOW DOWN. Just like the video is showing.

  16. #29
    Registered User Array Treuntas's Avatar
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    I had a dump truck with a trailer pull out in front of me once on Westminster Highway. I was going over the bridge and around the corner onto Westminster Highway, near the bike shops. There is a light at the bottom of the corner. It was my first month or two of riding. I looked ahead and saw that the light went green, so I accelerated. The moron in the dump truck on the opposite side entered the intersection to turn left, but his filter went off. Instead of sitting there waiting for a yellow he just decided to turn. The cars in front of me braked hard. I was probably doing about 50 when I tried to stop like a noob. Locked my brakes up and I went down. I slid along the road, but stopped short of sliding underneath the dump truck and trailer. The bike slid off to the left. There are a lot really dumb tractor drivers in the city. I should know I've worked with a lot.

  17. #30
    +1 Array schmii's Avatar
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    I had a 53' truck similar to this make a U-turn across a 6 lane stretch on hwy 5 returning from osoyoos and got uncomfortably close to that guard rail. From several hundred feet back the driver made a move once I was close...

    That rail is important for backing up to a loading dock that has standard guards for them.
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