2007-04-02 14:46:06 · 4 answers · asked by brianzava 1 in Cars & Transportation ➔ Rail
Perhaps colour blindness. Is the "red" line in close proximity?
2007-04-02 15:50:51 · answer #1 · answered by Samurai Hoghead 7 · 0⤊ 0⤋
On the London Underground at peak times the trains are so frequent (up to 1 every 2 minutes) that they often have to stop between stations to wait for the train ahead to clear the next station.
By 'green line' I assume you mean a line covered by a green signal, meaning 'clear to proceed'. The approach to the station would be covered by a red signal ('danger, stop') until the station was clear, then the signal would change to green.
2007-04-03 11:52:58 · answer #2 · answered by squeaky guinea pig 7 · 0⤊ 0⤋
Presumably you're talking about some subway/metro/underground railway somewhere in the world - but you don't say where... London, Boston, NY, Paris, Manila, the list goes on and on.
One simple guess would be congestion - there's a train still stopped at the station ahead.
2007-04-03 01:26:23 · answer #3 · answered by Geoff M 5 · 0⤊ 0⤋
It is a go forward signal.
2007-04-03 04:15:28 · answer #4 · answered by F-14Dude 2 · 0⤊ 0⤋