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    <title>Transport Research International Documentation (TRID)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>R-32 ENERGY STORAGE PROPULSION SYSTEM</title>
      <link>https://trid.trb.org/View/52124</link>
      <description><![CDATA[This paper describes a transit vehicle propulsion system which saves much of the presently wasted energy by storing the car's kinetic energy in two flywheels during vehicle braking.  This stored energy is then used to accelerate the vehicle out of the station without drawing power from the wayside electric power source.  The flywheel energy storage propulsion system has been installed on two New York City R-32 subway cars in place of the conventional propulsion equipment.  The two cars have completed extensive testing at the Department of Transportation Test Center in Pueblo, Colorado. Extensive testing of the energy storage propulsion system cars is being carried out on the New York City Transit Authority system.  At the conclusion of the test program the cars will be put into revenue service for reliability and energy saving evaluation.]]></description>
      <pubDate>Sun, 31 May 1981 00:00:00 GMT</pubDate>
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      <title>CRIME AND PERCEPTION OF CRIME ON A METROPOLITAN MASS TRANSIT SYSTEM</title>
      <link>https://trid.trb.org/View/52127</link>
      <description><![CDATA[Crime on transit systems has become a serious problem. Besides the hardship placed on those who are victimized, crime also seems to be a cause of decreasing patronage. Expansion of present systems or construction of new ones will alleviate the energy-environmental crunch only if commuters can be recruited away from their use of private automobiles.  A study of transit crime coupled with a telephone survey reveal that transit crime is perceived differently from street crime.  The results indicate that transit systems require uniquely designed security systems to reduce crime and increase public confidence in the system.]]></description>
      <pubDate>Sun, 31 May 1981 00:00:00 GMT</pubDate>
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      <title>ELECTRONIC SURVEILLANCE/RESPONSE SYSTEM TO REDUCE CRIME ON A MASS TRANSIT FACILITY</title>
      <link>https://trid.trb.org/View/52128</link>
      <description><![CDATA[This paper covers Carnegie-Mellon University's design of a surveillance response system to reduce crime on the City of Chicago's transit system.  It includes a brief review of the possible electronic devices applicable to a public transit system security network.  The "Teleview Alert System", which has been accepted and is being installed in Chicago is described in detail.]]></description>
      <pubDate>Sun, 31 May 1981 00:00:00 GMT</pubDate>
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      <title>FEASIBILITY STUDY OF A METHOD FOR OBSERVING TRACK STIFFNESS FROM MID-CHORD OFFSET AND PROFILOMETER MEASUREMENTS</title>
      <link>https://trid.trb.org/View/52130</link>
      <description><![CDATA[In the presence of a load, the mid-chord offset (MCO) and profilometer will see the vertical rail geometry (profile) in different perspectives.  The former is a distributed measurement of rail as seen at three points in space.  The latter is a single point measurement.  For uniform foundation and rail size, the effect of loading will appear as a bias in the MCO and will not affect the profilometer measurements at all.  But in the presence of a discontinuity in the foundation or the rail, loading will introduce variations in MCO and profilometer measurements.  An analytical expression has been derived to evaluate the effect of loading on MCO and profilometer measurements in the vicinity of a discontinuity in the subgrade system. Based on this analytical model, the signature for such a transition was derived.  This is compared with actual differences observed in track data.  Initial results indicate that this method has a good potential for determining sudden changes in track stiffness.]]></description>
      <pubDate>Tue, 31 May 1977 00:00:00 GMT</pubDate>
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      <title>INSTRUMENTATION FOR DATA COLLECTION ON A REVENUE FREIGHT TRAIN</title>
      <link>https://trid.trb.org/View/52131</link>
      <description><![CDATA[Instrumentation systems for the measurement of railroad vehicle dynamics must be designed to survive the extreme environmental conditions to which they will be exposed. This paper describes the rigorous railroad environment and some of the techniques used to cope with it.  Careful attention to the environmental constraints and precisely planned testing procedures will significantly increase the probability of a successful field test.]]></description>
      <pubDate>Tue, 31 May 1977 00:00:00 GMT</pubDate>
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      <title>LONGITUDINAL CONTROL TECHNIQUES FOR AUTOMATED GUIDEWAY TRANSIT</title>
      <link>https://trid.trb.org/View/52123</link>
      <description><![CDATA[The designer of an automated guideway transit sytem may select a number of different approaches to vehicle longitudinal control. These approaches may be broadly classified into point-follower and vehicle-follower divisions.  Control in the former case reduces to the problem of tracking a deterministically generated point while vehicle-follower control involves manipulation of vehicle position and velocity relative to other vehicles in the immediate vicinity. The selected policy has implications on the performance and hardware configuration of the vehicle longitudinal control system.  This paper reviews some of the fundamental considerations in the design of point- and vehicle-follower vehicle longitudinal control systems in the context of recent domestic and European system developments.]]></description>
      <pubDate>Tue, 31 May 1977 00:00:00 GMT</pubDate>
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