CLOCS Standard

The CLOCS Standard is the direct result of collaboration between the construction and fleet sectors to address shared issues.  It draws together evolving and applied best practice from a number of standards, policies and codes of practice to provide one industry standard that can be implemented by regulators, clients, principal contractors and fleet operators.

The CLOCS Standard is reviewed at intervals not exceeding two years and any amendments arising from the review will be published in an amended version.

The latest version of the CLOCS Standard (version 4) can be downloaded here.


The previous version of the CLOCS Standard (version 3) can be downloaded here.

CLOCS mission and primary goals

Ensuring the safest construction vehicle journeys

  • zero collisions between construction vehicles and the community
  • improved air quality and reduced emissions
  • fewer vehicle journeys
  • reduced reputational risk


The CLOCS Standard shall be applied to all construction projects/programmes.

The CLOCS Standard is a national industry standard. It defines the primary requirements placed upon the key stakeholders associated with a construction project and places responsibilities and duties on the regulator, the client, the principal contractor controlling the construction site and the supply chain including the operator of any road-going construction logistics vehicles servicing that project.

Key stakeholders

A construction project has four key stakeholders, deliberately creating a two-way flow of positive influence and information.

Executive summary of CLOCS requirements

The main CLOCS requirements for each are summarised below:

  • embed the requirement to operate to the CLOCS Standard into policy and guidance documents
  • ensure the planning process requires submission and approval of an outline and/or detailed Construction Logistics Plan (CLP) that addresses the main transport impact/risks in delivering the project safely before consent is granted
  • require a project to have effective CLOCS implementation monitoring mechanisms and to provide to the authority (if requested) CLOCS compliance performance data
  • have in place effective enforcement mechanisms to secure prompt action by the project team should a breach occur

  • specify in tender and contract documents for all stakeholders to comply to the CLOCS Standard
  • ensure the project team develops and implements a suitable and sufficient  CLP (Construction Logistics Plan)
  • ensure effective monitoring of compliance to the CLOCS Standard
  • obtain and monitor the contractor’s action plan to address all identified issues and non-compliances
  • obtain annual collisions and emissions performance information, and where appropriate, obtain a credible improvement plan

  • ensure the project’s potential impact on the community has been properly risk-assessed
  • develop and/or implement the agreed CLP and ensure it remains suitable and sufficient
  • procure site and fleet operations that comply to the requirements of the CLOCS Standard
  • ensure site arrangements enable the safest fleet operations including, but not limited to, ‘last mile’ routing, level access/egress, stable loading/unloading areas, effective delivery management systems and competent site access traffic marshals
  • ensure effective and efficient site access gate checks of construction logistics vehicles and their drivers to ensure they always comply to the CLOCS Standard. Non-compliances must be immediately risk-assessed, appropriately mitigated and addressed through procurement processes
  • ensure effective independent monitoring of the project’s compliance with the CLOCS Standard is undertaken approximately every 6 months and appropriate action taken to address non-compliance
  • obtain annual collisions and emissions performance information, and where appropriate, obtain a credible improvement plan

  • ensure they are part of a recognised independent fleet accreditation scheme or have a suitable management system in place that addresses the issues of management, vehicles, drivers and operations
  • in selecting their fleet accreditation, ensure all construction logistics vehicle operations meet the standards and requirements as described as Silver in the FORS Standard
  • provide acceptable evidence (as defined by each procurer) to demonstrate that requirements have been met