The Freeway New suburban freeway is being designed.

The Question How many lanes are needed to provide LOS D during the peak hour?

The Facts

$\sqrt[\phantom{2}]{?}5,000ve\frac{h}{h}($one direction$),$

$\sqrt[\phantom{2}]{?}$ Level terrain,

$\sqrt[\phantom{2}]{?}10$ percent trucks,

$\sqrt[\phantom{2}]{?}3\mathrm{.}0-m$ lane width,

$\sqrt[\phantom{2}]{?}0\mathrm{.}90$ PHF$,$

$\sqrt[\phantom{2}]{?}0\mathrm{.}9$ interchanges per kilometer,

$\sqrt[\phantom{2}]{?}3$ percent RVs$,$ and

$\sqrt[\phantom{2}]{?}1\mathrm{.}0-m$ lateral clearance.

Comments

Assume commuter traffic. Thus, $f_p=1\mathrm{.}00.$

$\sqrt[\phantom{2}]{?}$ Assume BFFS of $120k\frac{m}{h}.$

$\sqrt[\phantom{2}]{?}$ Assume that the number of lanes affects free$-$flow speed, since the freeway is being designed in a suburban area.