Using the information shown on your contour map, draw a longsection of the Centre Line of your road at scales; horizontal $1$:$2,000$ and vertical $1$:$200.$

Scale the distances along the road to each contour and show the results on the table of your answer sheet.

Design a vertical alignment of the centre line of the road showing grades and vertical

curves. The vertical alignment must meet the following criteria:

The road must start at RL $20\mathrm{.}43.$ It must finish exactly at RL $15\mathrm{.}50.$ at the chainage you have calculated as being the end of the road.

The Natural Surface RL at the start of the road is $20\mathrm{.}0$ and at the end of the road is exactly the same as the finishing Design RL of the road.

The first IP of the vertical design must lie at Chainage $170$ and RL $12\mathrm{.}95.$ After that you must complete the vertical design using two $(2)($or three at most$)$ rising grades and one falling grade, which generally follow the land surface. You must aim to keep the road $($i$.$e$.$ the cut or fill$)$ within $1\mathrm{.}0$m of the natural surface. If this cannot be achieved in a maximum of four new grades, complete your design using four grades and then make a brief report and explain where the road has excess cut or fill and by how much.

The grades you select for your design of the road must be between $1\%$ and $10\%.$

Vertical curves must have lengths of only $60$m$,80$m or $100$m$.$ The I.P$.$ of each vertical curve must be located at an even $10$m chainage $($i$.$e$.120,350$ etc. and must not be placed at odd locations such as $376\mathrm{.}5).$ All grades used must be to no greater precision than $0\mathrm{.}1\%,$ except for the final grade to the end of the line. $($i$.$e$.$ grades such as $3\mathrm{.}1\%$ must be used for every grade, except the final one where additional decimal places may be shown, if necessary, to ensure that the Design RL meets the set RL$.$

Every change of grade requires a vertical curve. $($Assume that your road will meet Tucker$$s Road precisely at the nominated RL$.$ No vertical curve will be needed at this road junction.$)$

Complete the table with your vertical curve calculations for the design levels.

Calculate the Design Levels at every $10$m of running chainage along the road. Also calculate the chainage $($to $2$ d$.$p$.)$ and RL of the low point of the road at the river crossing.

River and River Crossing Information

The banks of the river where the road crosses it are at R$.$L$.12\mathrm{.}6$

At the river crossing, the design level of the road must be between $1$m and $1\mathrm{.}5$m above the riverbanks to allow for a culvert to be built. If you believe that this can$$t be achieved design the road to be as close as possible to this specification and report the difference