Question $3(10)$: Determine the minimum length of a crest vertical curve, using the minimum

length based on SSD criteria if the grades are $+3\%$ and $-4\%.$ Design speed is $55m\frac{i}{h}.$

perception$-$reaction time is $2\mathrm{.}5$ seconds, deceleration rate is $11\mathrm{.}2f\frac{t}{se{c}^2}.$

Question $4(10)$: Determine the minimum length of a sag vertical curve if the grades are $-4\%$

and $+3\%.$ Design speed is $55m\frac{i}{h}.$ State assumptions used. Consider the criteria of stopping

sight distance. Perception$-$reaction time is $2\mathrm{.}5$ seconds, deceleration rate is $11\mathrm{.}2f\frac{t}{sec2}.$