New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1912-10-06
A DUAL SUBWAY SYSTEM
1t Is Expected To Be Built
Within Five Years.
WILL TREBLE FACILITIES
Total Yearly Capacity of New
and Old Lines To Be More
than 3,000.OOO.OOO.

Within five years It is expected that
the dual system Of subways will be COM
pleted In all its parts When completed
the rapid transit facilities Of the city
will have been more than trebled. Dur
ing the year ended June 80, 1911, shortly
after which the construction OF the new
system was begun, the existing rapid
transit lines carried 79S,2S1, $50 passen-
gers
- The new dual system will have a ca
pacity Of upward Of 5000, 100000. al
though It is not expected that such ca
pacity will be demanded Immediately
upon the completion Of the system.
The combined trackage Of the existing
lines dncluding IL miles Of the Hudson
e. Manhattan Railroad) amounts to 1903
miles of single track. To this will be
added by the new lines Of the dual sys-
TEN 334 miles Of single track, making a
new system with 637 miles Of single track.
The Hudson & Manhattan road, how
ever, is not to be a part Of the dual
system.
These facts are told in pamphlet ON
"The Dual System of Rapid Transit for
New York City which has just been
issued by the Public Service Commits
sion.
The pamphlet was compiled by J. b.
Walker assistant secretary to the COM
mission. It will prove to be one Of the
most highly priced additions to the rec
ords Of an up-to-date real estate office.
I,,IiI hou
been waiting for such handy reference
volume as this.
Almost every day some letters from
clients asking what effect the proposed
transit lines will have on certain prop
critics are received at the big brokerage
houses.
With the aid OF this little volume of
rapid transit facts the desired informa-
ton can be easily given. The pamphlet
is Illustrated. too. 1t contains several
maps Of the greater subway and elevated
system.
The new subways will sIow great i'm
provements over the existing subway In
many details For instance, some of the
stations in the existing subway are built
conditions when trains are loading ana
unloading at these curved platforms, ana
also makes II necessary for all trains APP
preaching such stations to slow down To
avoid danger. While these curved plat
forms are protected by all excellent Sig
nal system, the commissions engineers
believe that the safety OF operation viii
he promoted By eliminating curved plat
forms. Therefore all stations upon the
new subways will be located on straig II
stretches OF track, and go far as possible
sharp curves will d. avoided on all lines.
Another feature of the existing subway
which has been found inferior is the plac-
lrs OF all four tracks in one tunnel. This
condition prevails, with few exceptions,
for the whole stretch OF fouT-track sui =
way from the Brooklyn Bridge north TO
J6th street
Actual operation showed that this AZ
rangement interfered with the elective
ness OF the train movement upon ventila-
! ton. While the frequent passage CT
! trains stirred up the air, 1t did no. In
sure the renewal Of II, and In conse1d crce
the city had to spend a great deal OF
money to put in ventilating devices. The
commissions engineers believe they have
greatly simplified the problem OF ven:lla-
ton by constructing the new supways
with separate tunnels, so that the JAS
sage of trains will produce a piston ac-
ton. driving the air out ahead Of thtln
and causing the thrush of fresh air by
suction from the rear.
There will be partition wall between
each pair OF tracks. so that the effect OF
having one tunnel for trains going enc
way and another tunnel for those going
I'm the opposite direction will be produced.
In this partition wall archways Will be
provided at stated distances as places OF
safety to which track laborers may re-