GORP mandates the use of exterior lighting during tram operation. It mightn't really help the tram driver to see the road, but it signifies the tram's presence and identifies the leading end of the tram, since Melbourne trams are bidirectional and have identical exterior at both ends. Some drivers are used to conserving power, perhaps that's what they do at home, and intend to switch off interior lighting in daylight especially when operating a non-service car, although the company never tells them to do so. Since it's the same console switch that operates the interior and exterior lighting on A, B, Z class they would have turned off the exterior lighting by the same action. (I'm not sure how it's done on a Combino) It's possible to isolate the interior lighting while leaving exterior lighting on with the circuit breaking cupboard, but I don't think it's worthy of doing since the power consumption of lighting is trivial compared to that of traction.Can anyone here explain GORP or link, say, to a thread about it? It obviously doesn't help a tram driver see the tracks ahead during daylight hours. Yes, having one control for interior and exterior lighting has been given as a reason before for why the headlights are on all the time, even when it's glary, and that raises the question of why there aren't separate controls for them in the first place.
I presume trams run with headlights on day or night generally as they are seen as small trains rather than big buses.This is the correct answer, just as it was every previous time Myrtone raised the topic on Railpage and other fora for over a decade now.
Because it is expected that people get out of the way rather than rail vehicles braking for people, rail vehicles are required to be as visible as possible to all road users. Modern lighting does a better job than the yellow panels or tiger stripes of old, so the best practice has shifted accordingly.This depends on lighting conditions if there is ample natural daylight and the vehicles reflect ample light, then emitting light should either never make a difference or simply add frivolous glare, see drivers against daytime running lights.
It is good that the technology is improving and modern trams have lights with better directional optics. The next step will probably be to incorporate steered beams for sections of curved track, maybe have two lights on each side with one staying straight at all times and the other being steered automatically.Directional headlights have existed for decades.
Because it is expected that people get out of the way rather than rail vehicles braking for people, rail vehicles are required to be as visible as possible to all road users. Modern lighting does a better job than the yellow panels or tiger stripes of old, so the best practice has shifted accordingly.This depends on lighting conditions if there is ample natural daylight and the vehicles reflect ample light, then emitting light should either never make a difference or simply add frivolous glare, see drivers against daytime running lights.
Can't you clearly see a vehicle without headlights on the brightest days, like bright enough to be wearing sunglasses? Also, has anyone here check out that site opposing daytime running lights? And before anyone here claims it is a conspiracy or rhetoric type site, think about your personal experience and about whether there was a time when you have never heard of daytime headlight use.No. A headlight on low beam is not frivolous glare. High beam is different, but a low-beam headlight in daylight will not appear as bright as it is at night. Parking lights are useless. In my experience day running lights are much brighter than parking lights, but low-beam headlights are much better for visibility. Have you not ever driven anywhere where vehicles simply disappear into heat haze? Take yourself on a trip around Australia and get back to me...
EDIT: Daytime running rights, about the same brightness as parking lights, are, in fact, quite visible in cloudy weather, not so much on a clear day. But on the brightest daylight periods, headlights bright enough to be seen would just add frivolous glare.
But on the brightest daylight periods, headlights bright enough to be seen would just add frivolous glare.Do you have a driver's licence?
It is not a case of not seeing properly when headlights are used in broad daylight if headlights aren't needed to see the road/footpath/track ahead, then they should not need to shine in the eyes of people facing the front of a vehicle, (or driven end of trams and trains). It is not a case of not seeing the vehicle, it is a case of the brightness of headlights discouraging people from facing the vehicle or encouraging them to wear sunglasses when they do.These are the same sort of arguments that were used in the "compulsory lights on" debate around motorcycles years ago - oh but if I am driving into the Sun and a motorcycle with it's headlight on is riding towards me then I will have even less chance of seeing it.
And what about people who can't see properly when no exterior lights are used at all, even on the brightest days, don't they have a vision problem?
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