| If the SMARTram 21
Streetcars have rubber-tired wheels, do the drivers
have to steer them?
No. the streetcars will be steered by
a single, fixed-rail set in the pavement. The rail
will be flush with the pavement surface.
Why will a SMARTram 21 system
have lower capital costs?
Several reasons: First, it is only necessary
to build half as much guidelane. Conventional streetcars
require two sets of track--one for each direction.
("Single-track" portions of fixed-rail routes
must be relatively short because only one streetcar
can use them at a time.) Second, the SMARTram 21 guidelane
is simply a paved surface with a single, non-load
bearing steering track. Third the SMARTram 21 Streetcars
themselves will be smaller and lighter--and can eliminate
the need for overhead catenary power systems.
Why can't a SMARTram 21 system
be automated to work without drivers?
It could. However, doing so would require
operating the streetcars in a context where pedestrians
and other vehicles have no chance of wandering into
the guidelane. Even automated obstruction-sensing
systems don't offer the reliability and safety necessary
in the mixed vehicle and pedestrian context of a busy
shopping and business street. SMARTram 21 is the optimum
solution to balancing the need for pedestrian mobility,
vehicular through traffic, and safety.
What happens if a streetcar
breaks down?
Because they have rubber-tired wheels,
a broken SMARTram 21 streetcar can be easily towed
out of the guidelane to a maintenance facility. While
this is occuring, the system can continue to operate
normally on either side of the obstruction--in effect,
breaking into two separate synchronization systems.
After the obstruction is removed, the two systems
are combined again into one.
If an elderly person is taking
too long to board a streetcar, does the driver have
to hurry them up in order to maintain the synchronization?
Never! The system is able to absorb
random delays of various lengths--and this would simply
be another delay. The patented synchronization method
is described in detail in our Operations
and Design Manual.
What happens at signalized intersections?
Does the streetcar wait for the signal?
In order to keep delays to a minimum,
the SMARTram 21 architecture uses an "optimized
signal pre-emption." The synchronization logic
is interactive with the traffic signal controllers.
When a streetcar approaches a red light, for example,
it is "told" how many seconds until that
light will cycle to green; the streetcar controller
then slows the streetcar to reach the intersection
at that change cycle. If this causes the streetcar
to slow below a speed deemed "inconvenient"
by the system programmers--say below 5 mph (twice
walking speed), the streetcar will pre-empt the traffic
signal.
Won't local businesses object
to removing the parking from one side of the street,
in order to build a SMARTtram 21 guidelane?
Only until they realize that what they're
getting in exhange for that parking is something much
better for their business. A high-convenience, high-capacity
streetcar system--like SMRrTRAM--is projected to increase
potential customers to any given store by
as much as 1700% or more!
COST DIFFERENTIATORS:
SMARTtram 21 does not require imbedding
steel tracks in the roadway. The SMARTram 21 guidelane
is simply a narrow, concrete roadbed with a single
"steerage track" in the middle.
An overhead catenary electrical infrastructure,
while an option where it is cost effective or desirable,
is NOT required for the SMARTram 21 streetcars.
SMARTram 21 requires only half the infrastructure
of a dual-track streetcar system. To serve a 1.5 mile
long corridor, for example, requires 1.5 miles of
SMARTram 21 guidelanebut 3 miles of fixed rail
for an electric streetcar system.
SMARTram 21 requires only half the Stop-Boarding
Areas. Dual-track systems often require separate boarding
areas for each travel direction.
SMARTram 21 streetcars can be driven
out of the guidelane to remote maintenance-storage
facilities. In contrast, fixed-rail or elevated APM
systems require either nearby maintenance-storage
facilities (at high-cost locations) or extensive track
infrastructure to access more distant sites.
CONVENIENCE DIFFERENTIATORS:
Fixed-rail electric streetcars typically
share traffic lanes with local street traffic.
This means they are subject to delays from traffic
congestionespecially during periods of peak
demand. SMARTram 21 does not share street space with
local traffic. Its movement and headway are consistenteven
if the streets are highly congested.
At each "arrival" pedestrians
have the choice of boarding a streetcar going
in either direction. Conventional streetcars often
require pedestrians to wait at different boarding
areas depending on the direction they wish to go.
Because they are expensive, fixed-rail
electric streetcar systems, often do not have enough
cars to create convenient headways. This problem is
exacerbated by the fact they travel in traffic congestion--resulting
in headways 10, 15 minutes or more. The less expensive
SMARTram 21 streetcars, traveling in their dedicated
guidelane, can maintain a consistent 150 second headway
even during periods of heavy congestion.
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