Part B $(50$ marks$)$

Instruction: Answer all questions in the answer book provided.

Please describe the importance of horizontal curve and vertical curve in road construction.

$(8$ marks$)$

A crest vertical curve joins $a+3\%$ and $-4\%$ grade. Design speed is $100k\frac{m}{h}.$ The curve length is $530m.$ The chainage at the $P$ is $3460\mathrm{.}00m,52\mathrm{.}50m$ above the sea level. Calculate points along the vertical curve at chainage $3500m,3600m,3700m$ and highest point.

$(15$ marks$)$

Explain the meaning of the following terms;

a$.$ Remote Sensing

$(4$ marks$)$

b$.$ Geographical Information System $($GIS$)$

$(4$ marks$)$

c$.$ Global Positioning System $($GPS$)$

$(4$ marks$)$

GPS$,$ remote sensing and GIS is a new technique and system in engineering survey. GPS is a system to identify the location, remote sensing is a technique to collect and capture the image from the satellite and GIS is a new system to analyze and producing map. How these $3$ techniques and system can be integrated to enhance the quality in the civil engineering work.