At an uncontrolled intersection in urban area a two$-$lane road with design speed V$1$ km$/$h of north$-$south direction meets another two$-$lane road with design speed of V$2$ km$/$h aligned in east$-$west direction. Draw the sight triangle at the north$-$west corner of the intersection with proper dimension. Both the roads having the footpath of $1\mathrm{.}5$m