James wrote:Hi Soren good to see you posting again.
Good work with the diagram. One question though, surely variables such as 1) The performance of one's vehicle and 2) The reaction of the overtakee will have some play with the figures?
I am just thinking that slower vehicles may need more than the 0.3 of a second to gain sufficient momentum from the overtaking position to pass, having levelled with the speed of the traget vehicle. This is as opposed to approaching already at a speed sufficient to glide past...
Your thoughts?
ScoobyChris wrote:I may have misunderstood this (it's not the first time), but if I perform a momentum overtake of a car travelling at 60mph and my speed is 1000mph surely my time exposed to danger should be less than if I perform the same manouevre at 100mph?!
Chris
7db wrote:Nicely put, Soren.
I think the key point is to realise how hard is it to brake when you are catching someone quickly and they brake. mostly we don't get experience of this. When it happens, it is surprising how hard you need to brake.
You are committed very early at speed.
vonhosen wrote:7db wrote:Nicely put, Soren.
I think the key point is to realise how hard is it to brake when you are catching someone quickly and they brake. mostly we don't get experience of this. When it happens, it is surprising how hard you need to brake.
You are committed very early at speed.
But if you are already offside when they brake (& don't have to return to the nearside) it reduces TED, the problem is if your only option is to pull in behind them & match speed (or stop as the case may be) & you haven't anticipated that level of braking sufficiently early.
7db wrote:
Either way you are committed to avoiding him very early at high speeds should he decide to lock up and slide sideways into the middle of the road at the sight of a bunny appearing from nowhere.
Søren wrote:7db wrote:
Either way you are committed to avoiding him very early at high speeds should he decide to lock up and slide sideways into the middle of the road at the sight of a bunny appearing from nowhere.
I see that as one of the dangers you are exposed to while overtaking.
Gromit37 wrote:I don't wish to upset our engineering/scientific brethren, but I agree with Luke. You don't learn to drive a car by figuring out all the maths behind it. An overtake is a matter of judgement and spatial awareness. If it were all down to numbers, why aren't all the best racing drivers, bowls, snooker and darts players engineers?
And YES, I hate numbers. My brain works very well with words, but numbers just do not flow smoothly. It's like trying to write with the other hand... possible but messy. Something to do with being left handed and the right side of the brain perhaps?
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