In fixed-guideway public transit
systems, offering
parallel express service is extremely costly...
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Construction expenditures for each
rail line must be doubled
to cover the requisite tunnels and trackage.
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Capital expenditures must cover
additional rolling stock.
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Express service increases the number
of platforms at each
express station, along with expanded concourses.
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For passengers, extra street level
entrances are required,
along with support for circulation between
concourses and platforms.
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Life-cycle costs for operations and
maintenance are impacted
for express train service, not to mention energy
consumption.
 Express
train service must confer enormous benefits indeed in
order to justify
these outlays. Of course, one expects the main
benefit of express
train service to take the form of reduced Trip Time.
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What
are the real payoffs attributable
to express service?
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