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.


CLOCS Standard version 3 - Executive Summary

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 vehicles servicing that project.

Key stakeholders

A construction project has four key stakeholders, deliberately creating a two-way flow of positive influence and information. The main CLOCS requirements for each are outlined 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
  • ensure that all collisions that result in harm (and near miss incidents) that occur on journeys associated with the project are quickly investigated and actions taken to prevent recurrence

  • 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 HGVs 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
  • review information on all collisions that result in harm (and near miss incidents) that occur on journeys associated with the project and ensure they are quickly investigated and actions taken to prevent recurrence

  • ensure all journeys are compliant with the CLOCS Standard (by addressing management, driver, vehicle and operations issues), meeting the requirements described as Silver in the FORS Standard
  • Provide acceptable evidence of compliance as defined/specified by each procurer