Traffic Light Optimization Based on Modified Webster Function

Table 2

Intersection traffic flow and saturation table.

	From south to north			From east to west			From north to south			From west to east
Direction	Turn left	Straight	Turn right	Turn left	Straight	Turn right	Turn left	Straight	Turn right	Turn left	Straight	Turn right
Green letter ratio	0.228571	0.228571	0.407143	0.178571	0.228571	0.407143	0.228571	0.228571	0.407143	0.178571	0.228571	0.407143
Maximum traffic	1800	1800	1800	1800	1800	1800	1800	1800	1800	1800	1800	1800
Traffic	306	412	162	130	616	188	206	396	188	164	582	214
Saturation	0.17	0.228889	0.09	0.072222	0.342222	0.104444	0.114444	0.22	0.104444	0.091111	0.323333	0.118889