If you have A B C D as 0 0 1 1 .... then car C would slam into car D if both EW and NS lights are green. So you have NS being green....or 1....which is ok. But you also need to set EW to 0.....instead of leaving it blank.
If you have A B C D as 0 0 1 1 .... then car C would slam into car D if both EW and NS lights are green. So you have NS being green....or 1....which is ok. But you also need to set EW to 0.....instead of leaving it blank.