Paul,
Probably the most significant improvement in transit time for general
feight traffic I recall
occurred around 1970 when EL redesigned its service to avoid intermediate
handling of cars
at Hammond, Indiana by using run-through power on trains such as AFST-100,
RI-100, MILW-100, etc. This project was initiated by EL VPO Fred Diegtel and,
while ostensibly an operating matter,
also turned into a marketing ploy allowing connecting carriers an opportunity
to move their
business on EL's "fastest freight schedules", hence the variations (ATSF-100,
RI-100, MILW-100,
et cetera).
With regard to your other observations about "loose car" railroading,
generally most of these logistical problems can be addressed by better scheduling
and closer adherence to trip plans. In
the alternative, time spent gathering loaded traffic at origin for movement
in block to destination
will cause bunching to occur and will likely result in additional handling
with no improvement in car utilization overall. In the case of hazardous
material shipments, most railroads are not keen on handling or holding this traffic
any more than necessary for obvious reasons. From a facility standpoint, most
hump yards are not designed to efficiently pass blocks of cars. Introducing
additional classification functions at origin points and holding traffic
there to perfect proper block size represent additional demands upon terminal
capacity at times when some of these facililities
are already fully subscribed. A similar case could be made if final serving
yards are required
to hold (and rehandle) bunches of traffic for customers whose facilties can
only handle a few cars per day. While the foregoing comments apply to the
movement of loaded traffic, the return movement of empty assigned cars in small
blocks would only compound the issues mentioned
above and should be considered as well.
Bill
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