Selective Door Operation, also called Selective Door Opening (or SDO) is a mechanism employed primarily on trains (although buses with multiple doors also generally have this feature) that allows the Driver or Conductor/Guard to open the doors of a train separately.
Read more about Selective Door Operation: Purpose and Operation of SDO, See Also
Famous quotes containing the words selective, door and/or operation:
“The selective memory isn’t selective enough.”
—Blake Morrison (b. 1950)
“I know, although when looks meet
I tremble to the bone,
The more I leave the door unlatched
The sooner love is gone....”
—William Butler Yeats (1865–1939)
“Waiting for the race to become official, he began to feel as if he had as much effect on the final outcome of the operation as a single piece of a jumbo jigsaw puzzle has to its predetermined final design. Only the addition of the missing fragments of the puzzle would reveal if the picture was as he guessed it would be.”
—Stanley Kubrick (b. 1928)