One intersection located in Mumbai has two roads crossing each other approximately at $90$ degrees. Both the roads have $6$ lanes, i$.$e$.,3$ lanes for each direction of traffic with a divider in the middle. None of the approaches is left channelized. This intersection has been experiencing a few number of angle accidents and head$-$on accidents involving right turning vehicles in the middle of intersection for the last $3$ years. The concerned authority has approached you to fix the problem at the site. Consequently, you carried out the traffic survey at the site which provides the traffic volume $($in vph$)$ along each approaches as presented below:

$(15)$

$\backslash$table$[[$Approach$,$Left turn,Through,Right turn$],[$N$,110,298,95],[$S$,35,639,266],[$E$,52,266,135],[$W$,193,202,112]]$

Given data:

Width of each lane $=3\mathrm{.}0m$

Saturation flow for $3\mathrm{.}0m$ width $=1850vphgpl$

$PHF=0\mathrm{.}92$

Show the tentative phasing scheme to be adopted for the intersection with the aim of maximizing the safety and minimizing the delay at the junction. Provide justifications. Estimate critical flow ratios for each phase.

Solve it using Webster Method