Quote:
Originally Posted by Mac Write
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Adding C-cars to Skytrain is not that simple.
First, the OMC can't handle anything longer than 2-car Mark II trains. If a C-car is added, they could not get the three-car train into the OMC for maintenance, and splitting it to do so weould be problematic and time consuming.
Second, if there is a fault on one car on a 2-car Mark II, the entire 2-car Mark II is taken out of service. Where there are 4-car Mark II trains (2X2-car units), one of the two car units can be detached for maintenance or taking out of service. With a three-car Mark II, the entire three car unit would need to be taken out of service.
Third, two-car units offer maximum flexibility in operation. Currently, they can make up 2-car or 4-car trains and in future with platofrm lengthened, 6-car trains. Using three car trains would limit it to a 3-car or 6-car train. Longer trains have more limitations.
Fourth, two car trains can be run at low ridership periods - e.g. late at night, early Sunday. Running a two car train is less maintenance and requires less power. Also, increases safety factor by having the small number of people in one 2-car unit, rather than spreadout over the length of a longer train.