Safety Central
Skip to content
  • Safety
    • Safety Communities
      • Ballast Dust Working Group
      • Industry Groups
      • Infrastructure Safety Leadership Group (ISLG)
      • Level Crossings
      • Network Rail Telecom
      • Prevention through Engineering and Design
      • School programmes
      • Sentinel
    • Safety Programmes
      • Home Safe Plan
      • Planning4Delivery
      • Fatigue Reduction
      • Electrical Safety
      • Drive Safe
      • Manual Handling
      • Safety Hour
    • Commitments, Rules and Policies
      • Close Call
      • Worksafe
      • Our Health and Safety Vision
      • Data Protection and GDPR
      • Code of Business Ethics
      • Driving Safety
      • Construction, Design and Management (CDM)
      • Principal Contractor Licensing (PCL)
    • On Site Solutions
      • Frontline Safety Critical Communications
      • Any Line Open
      • Asbestos Awareness
      • Delivery Point Management
      • Managing the Risk of Runaways
      • On Track Plant Safety
      • Route Services Supply Chain Operations
      • Site Lighting
      • Working at Height
    • Safety Campaigns
      • Public and passenger safety campaigns
      • Safety outreach toolkits
      • Risk Management
      • Railway Security
      • Take 5
      • Winter Safety Campaign
  • Health and Wellbeing
    • Occupational Health
      • Occupational Health and Wellbeing Strategy
      • OH Employee information
      • OH Manager support
      • Drugs and Alcohol standard (Network Rail colleagues only)
      • Drugs and Alcohol standard (supplier page)
    • Mental Wellbeing
      • Coping with Trauma
      • Feeling Positive
      • Handling Pressure
      • Living with Mental Health
      • Million Hour Challenge
    • Physical Wellbeing
      • Healthy Lifestyle
      • Managing Your Health
      • Training for Performance
    • Supporting wellbeing at work
      • First Aid
      • Defibrillators – Manager Support
      • Domestic Violence
      • Health Management Action Plan (HMAP)
      • Leading sensitive conversations
      • Supporting employee wellbeing at work
      • Menopause
    • Network Rail employee area
  • Environment and Sustainable Development
    • Biodiversity
      • Biodiversity Metric
      • Kent Pilot
      • Railway Sustainability Design Guide
      • Biodiversity Toolbox Talks
      • EcoReporter
    • Circular Economy
    • Environment
      • Contaminated Land
      • Emissions to Air
      • Noise, Nuisance & Disturbance
      • Pollution Prevention
      • Responsibly Sourced Timber
      • Waste
    • Energy and Carbon
      • Achieving ISO50001
      • Managing Whole Life Carbon in Railway Buildings and Infrastructure
      • Energy-Link and Published Data
      • Energy Management Tools
      • Energy Purchasing
      • Energy Saving Technologies & Services
      • Network Rail’s compliance obligations
      • Utility Standards & Processes
    • Social Performance and Social Value
      • Addressing rough sleeping on rail
      • Diversity Impact Assessments
      • Notifying our neighbours
    • Weather Resilience and Climate Change Adaptation
      • WRCCA Strategy
      • Weather Attributed Schedule 8 and Schedule 4 Data
    • E&SD Guidance Notes
    • E&SD PACE Tools & Templates
    • E&SD Toolbox Talks
  • Tools & Resources
    • Tools
      • Ask the expert
      • Behavioural Safety
      • Fair Culture Investigations
      • Infrastructure Loading Patterns
      • CIRAS
      • Jargon Buster
      • Opsweb
    • Resources
      • Resource library
      • Safety bulletins
      • Safety Hour discussion packs
      • Safety Stand Down Materials
      • Improving Railway System Safety
      • Safety outreach toolkits
      • Our Health and Safety Vision
      • Wales and Western Safety Messages
  1. Home»
  2. Jargon Buster Item»
  3. Sequential Locking»

Sequential Locking

A refinement of ‘Interlocking’ that ensures signals are operated only in a certain order.

0
Posted on May 19, 2016 by SBrierley.

Post navigation

← Sentinel SETTOL →

Key Information

DASP

Recent updates

  • Make a Challenge, Save a Life: Electrical Safety Hour

    December 2, 2024

  • Drive Safe

    November 14, 2024

  • SMTH Industry Competence Management Standardisation

    November 11, 2024

  • Electrical Safety Delivery

    October 22, 2024

  • NR/L3/ELP/SAI25 Forms

    August 21, 2024

Recent videos

  • Hold the Handrail

    6 years ago

  • Think RISK Plant

    6 years ago

  • Think RISK People

    6 years ago

  • Think RISK Place

    6 years ago

  • Think RISK Process

    6 years ago
© Network Rail 2023. All Rights Reserved
  • Jargon Buster
  • Ask the expert
  • Useful links
  • Privacy and Cookie Policy
  • Terms and Conditions
  • Contact us
  • Safety
    • Safety Communities
      • Ballast Dust Working Group
      • Industry Groups
      • Infrastructure Safety Leadership Group (ISLG)
      • Level Crossings
      • Network Rail Telecom
      • Prevention through Engineering and Design
      • School programmes
      • Sentinel
    • Safety Programmes
      • Home Safe Plan
      • Planning4Delivery
      • Fatigue Reduction
      • Electrical Safety
      • Drive Safe
      • Manual Handling
      • Safety Hour
    • Commitments, Rules and Policies
      • Close Call
      • Worksafe
      • Our Health and Safety Vision
      • Data Protection and GDPR
      • Code of Business Ethics
      • Driving Safety
      • Construction, Design and Management (CDM)
      • Principal Contractor Licensing (PCL)
    • On Site Solutions
      • Frontline Safety Critical Communications
      • Any Line Open
      • Asbestos Awareness
      • Delivery Point Management
      • Managing the Risk of Runaways
      • On Track Plant Safety
      • Route Services Supply Chain Operations
      • Site Lighting
      • Working at Height
    • Safety Campaigns
      • Public and passenger safety campaigns
      • Safety outreach toolkits
      • Risk Management
      • Railway Security
      • Take 5
      • Winter Safety Campaign
  • Health and Wellbeing
    • Occupational Health
      • Occupational Health and Wellbeing Strategy
      • OH Employee information
      • OH Manager support
      • Drugs and Alcohol standard (Network Rail colleagues only)
      • Drugs and Alcohol standard (supplier page)
    • Mental Wellbeing
      • Coping with Trauma
      • Feeling Positive
      • Handling Pressure
      • Living with Mental Health
      • Million Hour Challenge
    • Physical Wellbeing
      • Healthy Lifestyle
      • Managing Your Health
      • Training for Performance
    • Supporting wellbeing at work
      • First Aid
      • Defibrillators – Manager Support
      • Domestic Violence
      • Health Management Action Plan (HMAP)
      • Leading sensitive conversations
      • Supporting employee wellbeing at work
      • Menopause
    • Network Rail employee area
  • Environment and Sustainable Development
    • Biodiversity
      • Biodiversity Metric
      • Kent Pilot
      • Railway Sustainability Design Guide
      • Biodiversity Toolbox Talks
      • EcoReporter
    • Circular Economy
    • Environment
      • Contaminated Land
      • Emissions to Air
      • Noise, Nuisance & Disturbance
      • Pollution Prevention
      • Responsibly Sourced Timber
      • Waste
    • Energy and Carbon
      • Achieving ISO50001
      • Managing Whole Life Carbon in Railway Buildings and Infrastructure
      • Energy-Link and Published Data
      • Energy Management Tools
      • Energy Purchasing
      • Energy Saving Technologies & Services
      • Network Rail’s compliance obligations
      • Utility Standards & Processes
    • Social Performance and Social Value
      • Addressing rough sleeping on rail
      • Diversity Impact Assessments
      • Notifying our neighbours
    • Weather Resilience and Climate Change Adaptation
      • WRCCA Strategy
      • Weather Attributed Schedule 8 and Schedule 4 Data
    • E&SD Guidance Notes
    • E&SD PACE Tools & Templates
    • E&SD Toolbox Talks
  • Tools & Resources
    • Tools
      • Ask the expert
      • Behavioural Safety
      • Fair Culture Investigations
      • Infrastructure Loading Patterns
      • CIRAS
      • Jargon Buster
      • Opsweb
    • Resources
      • Resource library
      • Safety bulletins
      • Safety Hour discussion packs
      • Safety Stand Down Materials
      • Improving Railway System Safety
      • Safety outreach toolkits
      • Our Health and Safety Vision
      • Wales and Western Safety Messages