Lights on door pillars

[orienteer]

Wondering what the purpose of the lights at the top of the left hand, inside door pillars is. They flash briefly as the doors close.

[domh245]

I believe it is to do with PRM-TSI compliance. I think that it is necessary for vehicles to have audio and visual warnings that doors are closing. The audio stuff is pretty obvious, and the visual part is the little flashing light.

When a door that is automatically or remotely closed, is about to operate, an audible and visible alert
signal shall be given to persons inside and outside the train. The alert signal shall start a minimum of
2 seconds before the door starts to close and shall continue while the door is closing.

The sound source for door alert signals shall be located in the area local to the control device or, if
there is no such control device, adjacent to the doorway. The visible signal shall be visible from
inside and outside the train and shall be located such that it minimises the opportunity for it to be
obscured by passengers located in the vestibule.

www.era.europa.eu/Document-Register/Documents/Draft_PRM_TSI_version_2.0.pdf Section 4.2.2.3.2 (page 26)

[DWS]

Can some one tell us what "TSI" stands for ?

[programmes1]

Nov 12, 2014 7:13:51 GMT DWS said:

Can some one tell us what "TSI" stands for ?

Technical Specification for Interoperability

[orienteer]

Nov 11, 2014 22:56:35 GMT domh245 said:

I believe it is to do with PRM-TSI compliance. I think that it is necessary for vehicles to have audio and visual warnings that doors are closing. The audio stuff is pretty obvious, and the visual part is the little flashing light.

When a door that is automatically or remotely closed, is about to operate, an audible and visible alert
signal shall be given to persons inside and outside the train. The alert signal shall start a minimum of
2 seconds before the door starts to close and shall continue while the door is closing.

The sound source for door alert signals shall be located in the area local to the control device or, if
there is no such control device, adjacent to the doorway. The visible signal shall be visible from
inside and outside the train and shall be located such that it minimises the opportunity for it to be
obscured by passengers located in the vestibule.

www.era.europa.eu/Document-Register/Documents/Draft_PRM_TSI_version_2.0.pdf Section 4.2.2.3.2 (page 26)

Thanks! But I think it is pretty useless as a visible warning, being so high up and only on the left hand pillar.

The light in the door button is far more obvious, but I suppose an extinguishing light is not regarded as a warning.

[Deleted]

I have never looked for the lights, but its more than likely in the same place on a lot of stock (that is compliant with which ever regulation requires the light to be there).

[Deleted]

Personally I have an ingrained habit of looking at the door button lights, since the 1983/D stock was introduced, if they extinguish, it means do not board, the same as on the DLR and on mainline trains. (On Southeastern, there are a pair of overhead lamps in each doorway, that extinguish as soon as the train is ready for departure, when the doors start closing.)

[100andthirty]

LU is exempt from compliance with TSIs. The relevant legislation is the Rail Vehicle Accessibility Regulations. The main line was relieved of complying with RVAR when the TSI-PRM came along. However RVAR was retained for railways that are exempt affected by TSIs

[rsdworker]

In jubbbiee line extension (platform edge doors have over head lights - they extinguish when doors are closing) i prefer flashing stripe lights to warn passegners that doors are closing (Bergen trams have overhead lights that change colors) also Asterdam metro M5 has side led strip lights

so i think TFL could add strip lights on sides of doorway on S stock to make noticeable (the lighting could replaced with LED lights to make brighter)

[Deleted]

The lights above the doors on theJLE are for station staff to see if anyone is holding the doors open (same as the lights on the outside of other underground trains)

[norbitonflyer]

Don't the lights actually indicate whether the door locks are released? certainly on NR they are lit when the guard releases the door locks, not when they are actually opened, and extinguish when he shuts them, unless they fail to lock for some reason (like there's a coat trapped in it)

[Deleted]

Well with all tube stock apart from the S stock the doors aren't PO so what you said about the NR trains is a bit different on the tube.

[domh245]

I think that the function of the lights is hinted at in the name: Door Fault Indicators - ie, they illuminate when there is a door fault - ie. no interlock. This means that on the S stock, until the interlock is proven, the external lights stay on. On other tube stocks, it just so happens that with all the doors acting (almost) together, the DFIs all come on at the same time, as all of the doors unlock, and extinguish at (more or less) the same time as well, when they all re-lock.

[Deleted]

The s stock at lights at floor level which is useful for knowing where the doors are unlocked or not

[orienteer]

The lights I am referring to are inside the cars, at the top of the left hand pillar. They simply flash on briefly when the doors start to close. I still don't understand what the practical purpose of them is. The door button and floor level lights are much more useful.