Yellowspoon wrote:On the orange line between North Station and State, in each direction are yellow-over-red signals (or red-over-red after a train passes). What are these for? Is there a crossover between the stations?
Yellowspoon wrote:Reverend Jim Ignatowski knows.
Is there a speed limit when operating under a yellow light?
What "information" are they passing on to the train operator? Do you have a cite for that because it doesn't sound logical. The MBTA is so old that dips and curves are all over the place. To my knowledge, the only yellow-over-red signals that do not approach a switch occur between Downtown Crossing and Haymarket. In the case of Haymarket, the south end of the station has north facing yellow-over-red signals on both northbound and southbound tracks.dieciduej wrote: ... Signals between Haymarket and Downtown Crossing are more for information due to line-of-sight issues, the tracks taking take a dip NB and the curve into State SB.
JoeD
The signal at the west end of Waban (westbound) never turns green. I assume this is a result of the accident of 28-MAY-08. What you're saying is that it has no meaning.bostontrainguy wrote:Yellowspoon wrote:Is there a speed limit when operating under a yellow light?
No, only indicates that the next signal is (usually) red and the driver must be prepared to stop at that signal.
Yellowspoon wrote:The signal at the west end of Waban (westbound) never turns green...What you're saying is that it has no meaning.
Yes there is. If everything is working properly, you will never get a green before a red, double red, or double yellow.Yellowspoon wrote:Separately ... the signal at the north end of track 3 at Park Street is usually green. Is there an intervening yellow in the 20m before the switch from Government Center, or can a BC train go from green directly to (double) red?
CRail wrote:Yellowspoon wrote:The signal at the west end of Waban (westbound) never turns green...What you're saying is that it has no meaning.
No, it indicates to the motorman that he/she must operate the train prepared to stop at the next signal. There are several signals which never turn green regardless of the following signal's aspect, being prepared to stop doesn't mean that you're going to.Yes there is. If everything is working properly, you will never get a green before a red, double red, or double yellow.Yellowspoon wrote:Separately ... the signal at the north end of track 3 at Park Street is usually green. Is there an intervening yellow in the 20m before the switch from Government Center, or can a BC train go from green directly to (double) red?
It doesn't answer the question. Why is this signal different? If this yellow light means to be prepared to stop at the next signal, why not eliminate green and only use yellow/red for all signals?CRail wrote:Yellowspoon wrote:The signal at the west end of Waban (westbound) never turns green...What you're saying is that it has no meaning.
No, it indicates to the motorman that he/she must operate the train prepared to stop at the next signal. ...
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