Lone worker alarms for Rail and Public Transport staff

Crystal Alarm provides proven lone worker alarms and personal safety solutions for rail operators and public transport providers, enabling onboard staff to raise a discreet alarm instantly, whether the train is moving, stationary at a platform or operating underground.


Keeping Rail and Public Transport staff safe, understanding the risks

Violence against transport workers is increasing. For onboard staff in rail and public transport, personal safety is not an abstract concern – it is a daily operational reality. Train managers, conductors, drivers and service personnel work in close proximity to passengers under time pressure, often without colleagues nearby. Threatening behaviour, ticket disputes, assaults and disturbances can occur on a moving vehicle with no immediate ability to leave the situation or call for help in the conventional sense.



The challenge: lone working in rail and public transport environments

Onboard work creates a unique set of lone working risks. The workplace moves continuously, colleagues are rarely in the same carriage, and traditional fixed alarm systems are wholly unsuited to vehicles in constant motion. At the same time, employers face growing regulatory and operational requirements to provide effective personal safety alarms, backed by clear response procedures and reliable alarm chains.


Risks that onboard staff face daily include:

  • Threatening or aggressive passenger behaviour, including verbal and physical assault
  • Ticket disputes escalating to confrontation
  • Lone working during low-frequency services or night operations
  • Medical incidents involving passengers requiring immediate coordinated response
  • Situations in tunnels or underground sections where external communication is restricted


For employers, providing a reliable lone worker alarm that functions in all these conditions – and integrating it directly with traffic control operations – is both a duty of care requirement and a practical safety imperative.

Benefits for rail and public transport operators

Immediate assistance, one press, instant response

Staff can trigger a lone worker alarm with a single press of the Crystal Button or mobile app, even in threatening situations where speed is critical.

Full control for traffic control operations

All alarms are routed directly to your own traffic control centre or an external Alarm Receiving Centre (ARC), with no intermediaries and no delay.

Robust and proven lone worker solution

Trusted by Sweden's largest rail operators, including SJ, Transdev and Vy, in real operational environments every day.

Accurate real-time positioning

GPS location data is shared automatically at the point of alarm, giving traffic control the situational awareness needed to coordinate a fast and appropriate response.


How the alarm chain works

Instant, discreet alarm activation

Staff trigger an alarm via the app or Crystal Button, with no visible action required in threatening situations.

Direct routing to traffic control or ARC

The alarm reaches the operator's traffic control centre or Alarm Receiving Centre immediately, with full positional data.

Audio monitoring and coordinated response

Traffic control can assess the situation in real time and deploy the appropriate response, such as police, on-board colleagues or emergency services, without waiting for verbal confirmation.


Safety that you can trust

  • +16 000

    Crystal Alarm's personal safety solutions are trusted daily by thousands of businesses, regions and municipalities.

  • CE-certified products

    All our devices meet European safety and quality standards.

  • IP-rated hardware (CB20)

    The Crystal Button CB20 is IP-rated and built to withstand demanding working environments, offering protection against dust, moisture and rough handling.

  • Dedicated alarm centre + integration with external ARC

    Real-time response, either through our own dedicated alarm centre or via direct connection to established partners such as Avarn or SOS Alarm.

  • Local support

    Personal assistance in Swedish, with direct access to technical expertise and service.

"Med Crystal Alarm har vi skapat en larmkedja som verkligen fungerar. Våra medarbetare kan larma diskret via larmknappen vid hot om våld och vi har möjlighet att larma med "Man Down" funktionalitet när vår personal utför arbetsmoment där det finns risk för olycka . Larmet går direkt till vår interna larmcentral och kollegor, och vi får position och kommunikation utan fördröjning. Det ger trygghet för personalen och kontroll för oss som arbetsgivare."

Anders Edgren, Systemansvarig Personlarm, Alkoskåp, Kroppsburen Kamera, SJ AB

Find out how Crystal Alarm works for transport teams

Late-night shifts, isolated stations, lone drivers, and transport teams face risks that most safety solutions aren't designed for. Crystal Alarm gives your staff a fast, discreet way to raise an alarm and share their location the moment they need help. Tell us about your setup and we'll tailor the conversation accordingly.