Question $4$

The horizontal alignment for a diversion $($temporary detour$)$ was given as follows;

$\backslash$table$[[$Point$,$Stake Value,Y co$-$ordinate,X co$-$ordinate$],[$START$,0\mathrm{.}0,25784,420,6450,860],[$PI$1,25847,270,6307,704,],[$END$,25948,000,6205,500,]]$

The design speed for the diversion is $100k\frac{m}{h}r$ and the horizontal curve radius is $120m.$ Determine the following;

$4\mathrm{.}1$ the stake values for EC$1$ and END

$(7)$

$4\mathrm{.}2$ the co$-$ordinates of $BC1$ and $EC1$

$(2)$

$4\mathrm{.}3$ whether the horizontal curve is left or right turning.

$(1)$

$(10)$