For $21-25,6$ curve $($measured at the centerline of the inside lane$)$ is being designed for a highway with a design speed of $70m\frac{i}{h}r.$ The grade is level, and the driver reaction time will be taken as $2\mathrm{.}5$ s $,$ the AASHTO standard for highway braking reacrion.

$31.$ What is the reaction distance?

a$.48\mathrm{.}65$

b$.19\mathrm{.}46$

c$.257\mathrm{.}25$

d$.109\mathrm{.}90$

$22.$ What is the braking distance?

a$.469\mathrm{.}583$

c$.55\mathrm{.}463$

b$.143\mathrm{.}063$

d$.16\mathrm{.}897$

$*$

$23.$ What is the stopping sight distance?

a$.252\mathrm{.}963$

b$.726\mathrm{.}833$

c$.104\mathrm{.}113$

d$.36\mathrm{.}357$

$24.$ What is the radius of the curve?

a$.68\mathrm{.}322$

c$.190\mathrm{.}986$

b$.726\mathrm{.}833$

$($d$.)954\mathrm{.}930$

$25.$ What is the closest any roadside object may be placed to the centerline of the inside lane of the roadway?

a$.1\mathrm{.}419$

c$.7\mathrm{.}051$

$($b$.)68\mathrm{.}322$

d$.253\mathrm{.}245$