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Post by Deleted on Jan 11, 2011 17:16:32 GMT
Is there a distance to go display in the cab so the driver knows how far it is to the next block section? If not then how do they know where they have to stop or reduce speed by if driving in coded manual? In the open sections you can see the block markers but these wouldn't be clear in the tunnel?
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Post by Deleted on Jan 11, 2011 20:33:06 GMT
They have sounds in the cab I think, One increasing in pitch and one decreasing in pitch for faster or slower, also an illuminated marker is displayed on the speedometer. I may be wrong your gona need an expert on here
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Post by Deleted on Jan 11, 2011 20:39:37 GMT
That's not what the OP was asking for.
There is the up and down chimes for ATP, telling the driver to speed up or slow down, and the target speed displayed on the board, but I'm not aware of any DTG measurements, though the ATO system is provided with them via the PAC and tachometers.
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Post by superteacher on Jan 11, 2011 20:44:39 GMT
That's not what the OP was asking for. There is the up and down chimes for ATP, telling the driver to speed up or slow down, and the target speed displayed on the board, but I'm not aware of any DTG measurements, though the ATO system is provided with them via the PAC and tachometers. No DTG indications are available, as the system is not based on the DTG system. The chimes do not tell the driver to go faster or slower, but merely that the target speed is increasing ot decreasing at the start of the next block. |
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Post by Deleted on Jan 11, 2011 20:58:04 GMT
No DTG indications are available, as the system is not based on the DTG system. The chimes do not tell the driver to go faster or slower, but merely that the target speed is increasing ot decreasing at the start of the next block. I know it's a fixed block system but the PAC gives block lengths and profiles to the ATO system. As for the chimes, that's what I meant; the ding ding ding sound going up/down as the ATO codes involve target speed for current block and next block. |
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Post by superteacher on Jan 11, 2011 21:07:50 GMT
No DTG indications are available, as the system is not based on the DTG system. The chimes do not tell the driver to go faster or slower, but merely that the target speed is increasing ot decreasing at the start of the next block. I know it's a fixed block system but the PAC gives block lengths and profiles to the ATO system. As for the chimes, that's what I meant; the ding ding ding sound going up/down as the ATO codes involve target speed for current block and next block. Yes the PAC does this, but I'm pretty sure this data isn't directly visible to the driver. |
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Post by Deleted on Jan 11, 2011 21:12:24 GMT
Yes the PAC does this, but I'm pretty sure this data isn't directly visible to the driver. Hence what I said earlier. Does the target speed display current block or next block? |
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Post by Deleted on Jan 12, 2011 0:36:11 GMT
Does the target speed display current block or next block? The target speed is the speed the train should be travelling at at the end of the block. For example, a target speed of zero means the train should stop at the next block marker board. |
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Post by Deleted on Jan 12, 2011 5:19:51 GMT
Is there a distance to go display in the cab so the driver knows how far it is to the next block section? If not then how do they know where they have to stop or reduce speed by if driving in coded manual? In the open sections you can see the block markers but these wouldn't be clear in the tunnel? The block markers are reflective so can be seen in the train's headlights. As for how the driver knows where to stop or reduce speed - line knowledge, simple as that. I was a driver on the Central when it was all manual driving with ATP (i.e. after the current signalling had been installed but before full ATO was up and running) and just as with a conventionally signalled line the driver should know the road and know where the next BMB/colour light signal is. I guess that now trains are operating mainly in ATO drivers may not be so confident when they have to drive manually - certainly I was travelling on one recently and I could tell it was in manual because it was going significantly slower than usual (but not slow enough to be in RM). |
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Post by Deleted on Jan 12, 2011 6:49:17 GMT
The target speed is the speed the train should be travelling at at the end of the block. For example, a target speed of zero means the train should stop at the next block marker board. In that case there will always need to be a full block between trains then and less capacity than if a train could advance to the block marker immediately in rear of the occupied block. |
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Post by superteacher on Jan 12, 2011 19:47:55 GMT
The target speed is the speed the train should be travelling at at the end of the block. For example, a target speed of zero means the train should stop at the next block marker board. In that case there will always need to be a full block between trains then and less capacity than if a train could advance to the block marker immediately in rear of the occupied block. True, although the length of the blocks is shorter than on conventionally signalled lines, so the capacity should still (theoretically) be better than those lines. |
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