Purulia Express: লালপাহাড়ীর দ‍্যাশে যাবি? চিন্তা কিসের লো? বিকাল বেলা হাওড়া থেকে পুরুল্যা এক্সপেরেস পাবি। - Dip

What you are describing is just MACL (Multi-Aspect Colour signalling). This is common all through-out IR on all routes, irrespective of the type of signaling (Absolute block or Automatic block).
What this tender is mentioning, are 'Double distant signals'. These are just warning signals that are placed a short distance before the actual signal. For example, if there is a signal at the entrance to a station, another warning signal may be placed roughly 1 KM before the station's signal. This will let the loco pilot know the status of the signal up ahead and prepare accordingly.
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case the signal at the station is showing Red, the distant signal will show a Yellow. If the station's signal is a Green, the distant signal will show a Green as well. Distant signals typically do not have a 'Red' indication. They only have Green and Yellow indicators and just serve as some warnings to the loco pilot, so that he/she will have some time to prepare for the next signal.
In some cases, there may be provision for a second distant signal, about 2km out from the main signal. I believe this is what the document is referring to as 'double distant signals'. In this case too, the same rules apply. These are just signals that let the LP know what the status of the main signal is. They can be passed at normal speed and the LP can choose to slow down afterwards, or if the LP feels that there isn't sufficient braking distance, he/she can start slowing down immediately.
This has got nothing to do with the type of signalling on the route. Distant signals are common on many routes.