$(10$ Points$)$ A four$-$lane freeway has the following

facts:

Lane Width $=11ft$;

Right$-$side lateral clearance $=2ft$;

Ramp density in the urban area $=3$ramp$\frac{s}{m}i$;

Commuter traffic $($regular users$)$;

Please estimate the FFS and the base capacity based

on the FFS$.$