The Silicon Valley Rapid Transit
Corridor's MIS Public Comments Document (June 2001) concluded
"PRT is not recommended for further study at this
time." The evaluation included this statement: "It
does not have the speed or capacity to serve the travel demand
in this corridor."
is proposing 70-150
mph PRT systems, it makes sense to start slow. So, some
PRT systems are starting out with higher speed guideways, but cabs
that only go 25 mph. After PRT proves itself at 25 mph, raising
the cab speeds to 45 mph will be easy. As you probably know, 45
mph is what BART averages due to all of its stops. PRT
cabs, which don't stop between origin and destination stations, would
be just as quick as BART while only going 45 mph.
As for capacity, one guideway
can handle up to 6,000 people per hour (pph). (Click here
and pictures.) BART's projected peak demand of 18,000 pph
in the year 2030 can be accomplished with three PRT guideways.
Although a 3-guideway PRT solution could cost up to $60M/mile,
that's still well below BART's estimated $200M/mile. By starting
with one guideway rather than 3, we dramatically reduce the
financial risk. When we find that the capacity is too low, we
can use the expected positive cash flow from the original guideway to
pay for the the next guideway. If we eventually build all three
guideways, the cost will be born mostly by users.
But here's the kicker, with
PRT you get 12 times the coverage - which makes it convenient for
users. Here are the numbers:
Each guideway direction can be
separated rather than occupying the same corridor. That doubles
Three separated guideways instead
of one bi-directional BART line covers 6 times the area.
PRT stations are spaced every 1/2
mile along the guideway; BART stations are spaced every 1-7
miles. Let's assume a minimum of 2 PRT stations for every BART station.
TOTAL COVERAGE: 2
directions X 3
guideways X 2 times more stations
. = 12 times BART coverage.
Request for support
- fill out a survey.
The Sunnyhills Neighborhood
Association (SNA) has proposed a city-wide
PRT system in
Milpitas that would link the city together, serve elders and youth,
Learn about other options for PRT
in Milpitas at www.electric-bikes.com/prt-milp.html
Help SNA demonstrate public
support. Help bring PRT to Milpitas. Fill
out a survey and mail it in.
Further Information and Status
of PRT Projects.
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