A four-phase signal critical lane traffic flow is given in table below:
|
Direction |
Design hour Flow (PCU/hr) |
Saturation Flow (PCU/hr) |
|
East - West |
500 |
3000 |
|
West - East |
450 |
1800 |
|
North - South |
250 |
2200 |
|
South - North |
- |
2500 |
The lost time is given as 3 secs for each phase. If the cycle length is 70 seconds, then the effective green time (in seconds) of the fourth phase is ______.
Enter numerical value using the virtual keypad. Round off where necessary.