Question $1$

$0$ pts

An equal$-$tangent vertical curve is located on a roadway designed for

$60m\frac{i}{h}$ and has a PVT at station $18+50.$ There is an initial grade of

$-2\%$ and a final grade of $+3\mathrm{.}5\%.$ What is the station of the PVC$?$

Question $2$

A horizontal curve is being designed with two lanes at a design

speed of $50m\frac{i}{h}.$ The lane width for the three lanes is $12$ feet. If

the superelevation is $6\%$ and the side friction factor is $0\mathrm{.}14,$ what

would be the appropriate minimum design radius?

Question $3$

A flexible pavement is known to have a structural number of $5\mathrm{.}0$ and

a soil resilient modulus of $9,000$ psi. If a pavement structure is to be

designed for a life of $25$ years, a reliability of $90\%$ and an overall

standard deviation of $0\mathrm{.}35,$ how many passes of a design vehicle with

a $20,000lb$ single axle and a $40,000lb$ tandem axle can be driven on

the pavement per day? The pavement's initial PSI is $4\mathrm{.}2$ with a TSI of

$2\mathrm{.}5.$A horizontal curve is being designed with two lanes at a design

speed of $50m\frac{i}{h}.$ The lane width for the three lanes is $12$ feet. If

the superelevation is $6\%$ and the side friction factor is $0\mathrm{.}14,$ what

would be the appropriate minimum design radius?