A four lane freeway segment $(2$ lanes each direction$)$ has a volume of $3200ve\frac{h}{h}$our in the

higher direction. The segment is $1\mathrm{.}5$ miles long and has a grade of $2\mathrm{.}5\%.$ Given $1\%$ buses, $2\%$

$RV\frac{s}{single}$ unit trucks, and $7\%$ tractor trailers. What would the service volume be in pcphpl$?$

Please round to the nearest whole number.

Assume a peak hour factor of $0\mathrm{.}95.$

The correct answer is below, i need to know how to solve it$.$

Service volume $=1994$