Railway signalling, T2-T3 tram line, Nice

Manage safe train movement on Nice T2 and T3 LRT lines

Date 2017/ 2019 – Client : Métropole Nice Côte d’Azur

tramway de nice T2-T3 par mobility

Services provided

  • Design, supply, installation tests and commissionning of  :
    • SIL4 new generation interlocking System for surface and in tunnel.
    • SIL2 Automatic train stop (Red signal crossing – automatic emergency brake trigering) for spacing management in tunnel (25 trains equiped and 2 maintenance machines).
  • Detection loops for trafic signalling.
  • 10 interlocking zones + 1 stabling and maintenance depot.
  • SIL4 software assessment by an Independant Safety Assesor (ISA).
  • Safety case up to authorities’ approval.
  • Operation and maintenance training.

Technical details

  • System based on CENELEC SIL4 Safety PLC’s (HIMA).
  • 92 axle counters, 280 loops, 27 on-boad automatic train stop equipment.
  • In main ligne : 9 interlocking areas, 10 spacing areas, 40 routes.
  • At the depot : Train movements on two stabling areas, one maintenance yard, one service area and one washing machine, 100 routes.
  • Interface with Operational control center, Rolling stock, traffic management system, Tunnel ventilation system, …

Key points

  • Customized SIL4 system adapted to specific operator needs.
  • Partial revenue service in 5 phases.
  • SIL2 red signal crossing detection trigering emergency brake through beacons and on-board equipment, enabling higher commercial speed.
  • Automatic route setting by mission numbers, driver command on trackside control panel.

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