The Bulletin
NEW YORK DIVISION BULLETIN - AUGUST, 2009
New York Division, Electric Railroaders’ Association Vol. 52, No. 8 The Bulletin Published by the New York Division, Electric Railroaders’ Association, Incorporated, PO Box 3001, New York, New York 10008-3001.
For general inquiries, contact us at nydiv@ electricrailroaders.org or by phone at (212) 986-4482 (voice mail available). ERA’s w e b s i t e i s www.electricrailroaders. org. Editorial Staff: Editor-in-Chief: Bernard Linder News Editor: Randy Glucksman Contributing Editor: Jeffrey Erlitz Production Manager: David Ross
©2009 New York Division, Electric Railro a d e rs’ Association, Incorporated
In This Issue: Brooklyn’s Forgotten Trolley Lines...Page 2
August, 2009
TIME SIGNAL CENTENNIAL Station time signals, which were installed on the IRT express tracks 100 years ago, allowed the company to run two or three more trains per hour. When one train was in the station, the original signal system held the next train in the block of track beyond the station. This system was designed to ensure safe operation. This block of track was the distance required to stop a train plus a 50 percent safety margin. But this system seriously delayed trains, especially during rush hours. Meanwhile, overcrowding kept increasing. To increase service, IRT consulted an expert Electrical Engineer, Bion Arnold. He recommended installing automatic speed control devices that allowed trains to enter the station block slowly instead of stopping completely in the next block. These time signals automatically stopped any train that approached an occupied station above predetermined rates of speed. Because the allowed speed progressively decreased when the train approached the station, trains entered the station safely. On April 23, 1909, the first station time signals were placed in service at 96th Street. By November 28, 1909, station time signals were operating on the express tracks at express stations between 96th Street and Brooklyn Bridge. By reducing the headway, these time signals allowed the company to operate two or three more trains per hour. The subway traffic was greater than antici-
pated. Although the subway was designed for a maximum daily capacity of 600,000 passengers, the builders planned on a maximum capacity of only 400,000 daily riders. In December, 1904, IRT averaged 300,000 passengers per day with little margin for growth. Daily traffic exceeded 800,000 in 1908 and reached 1.2 million six years later. IRT was unable to relieve the overcrowding because riding was increasing rapidly. But it increased service by installing station time signals and ordering 325 cars, 3700-4024. By installing center doors in all subway cars, loading was speeded up. The express platforms, which originally accommodated 8 cars, were extended to 10 cars in 1909. New car deliveries enabled the company to run 10-car expresses and 6-car locals. The first 10-car express ran on January 23, 1911 and all rush hour expresses were 10 cars on May 24, 1911. As a result of these modifications, the headway decreased from 2 minutes 4 seconds on the express tracks and 2 minutes 8 seconds on the local tracks in 1907 to 1 minute 48 seconds on both tracks in 1912. Therefore, service was increased from 29 to 33 trains per hour. Our source for the above article is Clifton Hood’s The Impact of the IRT on New York City from the Historic American Engineering Record. We do not know when the company started (Continued on page 20)
NEW YORK DIVISION ISSUES 500TH BULLETIN Overlooked last month was the fact that the July, 2009 Bulletin was the 500th issued since the first one in May, 1958. This does
not take into account nine Bulletin Newsletters that were issued in 1977 and 1978.
1 SHOP TOUR, SEPTEMBER 12 NEXT TRIP: NYCT E. 180TH STREET