06-06-2009, 03:03 PM
(06-06-2009, 06:20 AM)sugavanam nagarajan Wrote: Thank you for your comments.
Please clarify,
1.Signal having POL, Reduced overlap to be noted near R with # notes?
2.Before MAY occurs in the case of 109, condition of 135 need not to be shown in aspect sequence?
-Sugavanam
1. Are you confusing POL with ROL. POL stands for Phantom Overlap (see the notes on the plan) and in this case is of the correct length to be the full overlap. POLs are not often used and are where the point of the end of the OL does not coincide with a convenient track joint. Since it represents a full OL here, I do not think there would be any mention on the aspect sequence chart.
2. I think what you are asking can be explained as follows: Think of the approach to the signal first and then the onward route. The FY up to the signal is simple as it goes to Y+J4. After the release condition, the signal can show Y+J4 to R; YY+J4 to Y and G+J4 to G. You do not need to show the Y+J4 as two entries.