17-07-2009, 10:21 AM
Thanks for the reply,
I've attached a file showing what i was looking at. It is pages 17 - 18 of the file 'Model Answers 97 Onwards'.
In my reference to freight i was trying to show that I was aware it had different braking characteristics but it wouldn't be considered when calculating the highest possible SBD.
I also wasn't really intending to post my answer when I began so sorry it is a bit of a mess I only decided to post it since I was confused with the model answer. I think I had another Past paper open when i was doing this and i've got 144 as the design headway required for another paper. I think I got 3001 by adding my L,O & S wrong. I was trying to do it quite fast so probably put it into the calculator wrong.
Thank you for the feedback I see that I need more explanation and I also wasn't really looking at the Layout just the first page so I was trying to figure out why there were no stopping calcs. When I printed the whole lot out I realised my mistake.
I've attached a file showing what i was looking at. It is pages 17 - 18 of the file 'Model Answers 97 Onwards'.
In my reference to freight i was trying to show that I was aware it had different braking characteristics but it wouldn't be considered when calculating the highest possible SBD.
I also wasn't really intending to post my answer when I began so sorry it is a bit of a mess I only decided to post it since I was confused with the model answer. I think I had another Past paper open when i was doing this and i've got 144 as the design headway required for another paper. I think I got 3001 by adding my L,O & S wrong. I was trying to do it quite fast so probably put it into the calculator wrong.
Thank you for the feedback I see that I need more explanation and I also wasn't really looking at the Layout just the first page so I was trying to figure out why there were no stopping calcs. When I printed the whole lot out I realised my mistake.