SAFETY/SECURITYSUPPLEMENT 03


trains to operate at 85 second headways, compared with the 105 second limit that applied with the older signalling. This enables RATP to adjust train frequency to meet any peaks in ridership. This tighter headway highlights one of the chief benefits of automation. A human driver will always drive with an element of caution, having a little ‘in hand’ to ensure the ability to stop at the next red signal. A computer can drive to the limits of the train’s accelerating and braking systems, squeezing a little more out of the line capacity. One side-effect, if the computer is always accelerating and braking at precisely the same point, can be that rail wear rates increase noticeably at that point. When coupled with a switch to moving


block control, automation can dramatically increase capacity. Moving block is where trains can operate closely together, with the safe stopping distance to the train in front monitored by the computer. This is instead of the conventional ‘fixed block’, where the track is broken up into sections, with entry into each section controlled by a signal. With fixed block only one train is allowed into each section at a time, thus preventing collisions, but the historic system is wasteful of track capacity.


Introducing automation and moving block


can raise the number of trains that can be handled. On London’s Jubilee Line extension for example, automation and moving block were due to be introduced when the line was built in the 1990s, but problems with the technology meant that it was opened with conventional


Line, and now there are 27 trains per hour on the route, with a new timetable planned that will accommodate 30 trains per hour. Large crowds and consequent long station dwell times, rather than the limits of the technology, make it difficult to progress beyond 30 trains per hour in London.


Automated control from Siemens is being introduced on the Helsinki metro


signalling and line-of-sight driving. This limited throughput to 24 trains per hour. In 2011, a Seltrac automatic train operation system from Thales was installed on the Jubilee


Now that work on the Jubilee Line is


completed, Thales is to install a Seltrac system for London Underground on the Northern Line. These heavy metro routes follow on the


MOBILE VIDEO SURVEILLANCE BY EVERFOCUS


for recording on a max. 32 GB V 3.3 SD card (optional). The 4-, 8- and 12-channel models include a thermostat-controlled heater with delay function for DVR booting at low temperatures. They are equipped with a shock and vibration- proof mounting kit and are optionally available with wireless interface (802.11 b/g WiFi). Moreover, these models offer camera power outputs (interface cables to power jacks included) powering the cameras with 12 V DC, even when used in vehicles with 24 V input voltage (e.g. trucks or buses). Two different camera models round off the


With more than 15 years experience as a renowned manufacturer of excellent CCTV products, EverFocus offers a comprehensive product range geared to system integration. EverFocus Electronics Corp. with residence in Taipei, Taiwan, guarantees the worldwide distribution of CCTV products through branch


offices in China, Japan, India, USA and Europe. All EverFocus Mobile Digital Video


Recorders offer H.264 compression and are designed with a graphic user interface (GUI) to suit the small size monitors often used in mobile applications. The 2-channel DVR EMV 200 is the perfect entry model offering an SD card interface


www.everfocus.de Eurotransport www.eurotransportmagazine.com Volume 10, Issue 1, 2012


EverFocus mobile product range. The day/night vandal-proof camera EMW 330 comes in a streamline wedge type chassis. Dual position IR illuminators provide clear images up to approx. 15 metres. The day/night vandal-proof camera EMD 300 offers 3-axis positioning for flexible selection of the viewing angle. The camera is equipped with a 3,6mm fixed board lens and is available with black or silver base.


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16