dispatch. When you multiply this number by the turnaround time and
add to the product 10 percent to allow a reserve for contingencies,
you get the total number of cars, by type, required for the entire
operation.
Road engine requirements are computed separately for each
division by multiplying the TD by the engine factor and then
multiplying by 2 for twoway traffic and finally by 1.2 to provide a
20 percent reserve. When the number of road engines required for
each division is known, the total of these is the number required for
the whole rail operation.
The number of switch engines required at a division terminal is
one for every 100 cars passing through the terminal each day; at port
or loading terminals and at railhead or unloading terminals, the
requirements are one for every 67 cars dispatched and received per
day. Once the number of switch engines needed at each division
terminal, at the port, and at the railhead is known, the total plus
20 percent is the switch engine requirement including the reserve
factor for the entire rail operation.
When the planner knows how much equipment is needed, he must
determine how many people are required to operate it. The following
chapter explains how to determine personnel requirements.
42
Previous Page
