QUESTION $1$

How much is the adjustment factor for the presence of heavy vehicles $(f_{HV})$ for a consecutive upgrade consists of the following sections: the $1^{st}$ segment with $3$ percent grade and $1830m$ length and the $2^{nd}$ segment with $5$ percent grade and $1220m$ length. Truck comprises $8\%$ of traffic and recreational vehicles comprise $5\%.$

$0\mathrm{.}66$

$0\mathrm{.}77$

$0\mathrm{.}88$

$0\mathrm{.}92$

$0\mathrm{.}80$