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Unread 08-12-2011, 17:06   #5
markpb
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Join Date: Dec 2005
Posts: 541
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Quote:
Originally Posted by Traincustomer View Post
What does the abbreviation "SDO" mean?
"School days only" as in Bus Éireann timetables of years ago springs to mind (!!!) but I know it must be a railway-related term! Thanks in advance.
Selected door opening. It allows longer trains to serve shorter stations by only opening the front/back doors and stop passengers stepping out into the air.
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