Speed Limiters and CLOCS Compliance

CLOCS — Construction Logistics and Community Safety — is the industry standard that governs how construction logistics vehicles operate around active construction and demolition sites, particularly in urban environments. Developed in response to serious concerns about the safety of vulnerable road users near construction vehicles, CLOCS has become a contractual requirement for most major UK construction projects.

Speed management is central to the CLOCS standard. This guide explains what CLOCS requires, how speed limiters address those requirements, and how AutoKontrol’s technology — particularly GeoKontrol zone speed limiting — provides the controlled, auditable speed management that CLOCS compliance demands.

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What is CLOCS?

The CLOCS standard was developed by Transport for London and Crossrail in 2013 and is now managed by CLOCS Ltd as an industry-wide programme. It establishes minimum standards for:

• Vehicle safety features (direct vision, side guards, cameras)
• Driver training and competency (Safe Urban Driving — SUD — training)
• Route planning and journey management
• Speed management in and around construction sites and urban environments
• Monitoring and compliance verification

CLOCS compliance is a contractual requirement imposed by major Tier 1 contractors — including organisations such as Balfour Beatty, Skanska, Laing O’Rourke, and Kier — on all transport suppliers delivering to their sites. Without CLOCS compliance, logistics operators cannot work on these projects.

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CLOCS and Speed Management Requirements

Speed management under CLOCS is broader than simply fitting a speed limiter. The standard requires operators to demonstrate active management of vehicle speeds in and around sites, with particular focus on the protection of vulnerable road users — pedestrians, cyclists, and schoolchildren near construction areas.

Key CLOCS speed management requirements include:

Site Speed Compliance. Vehicles must comply with site-specific speed limits, which may be lower than public road limits. These site limits apply from the point of turning into a site entrance, not from a point within the site — meaning vehicles must be at the correct speed before entering the site area.

Urban Driving Speed Behaviour. CLOCS expects drivers to demonstrate appropriate speed behaviour in urban environments — not just at or below the legal limit, but at speeds appropriate to conditions, particularly where pedestrians and cyclists are present.

Documented Speed Management. Operators must have a written speed management policy and must demonstrate that it is enforced and monitored, not just communicated.

Evidence for Audits. CLOCS audits require documented evidence of speed management in practice — not assertions that policy exists, but data showing that speed behaviour meets the required standard.

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GeoKontrol: Purpose-Built for CLOCS Site Speed Management

The most demanding aspect of CLOCS speed management is site-specific speed enforcement — ensuring vehicles are at the correct speed when entering construction sites, regardless of the speed on the approach road.

This is exactly the problem AutoKontrol’s GeoKontrol zone speed limiting technology solves.

GeoKontrol uses GPS geofencing to define virtual speed zones around construction sites, urban areas, or any other location where a specific speed limit applies. When a vehicle enters a defined zone, the speed limiter automatically adjusts to the zone limit — without driver input. When the vehicle exits the zone, the standard road speed limit is restored.

GeoKontrol for construction site compliance:

• Define GPS boundaries around every construction site the fleet visits
• Set site-specific speed limits (5 mph, 10 mph, 15 mph — whatever the site requires)
• Vehicle speed is automatically enforced from the moment it crosses the geofence boundary
• Every zone entry, exit, and speed event is logged with GPS coordinates and timestamp
• Reports show which vehicles visited which sites, at what speed, and for how long

This creates an automated, tamper-resistant, and fully auditable speed management record for every construction site visit — exactly what CLOCS audits require.

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CLOCS and the London Safety Agenda

CLOCS originated in London and continues to have particularly strong application in the capital, where construction logistics interact with one of the most complex and vulnerable road user environments in the world. The Mayor’s Vision Zero programme — which aims to eliminate road fatalities and serious injuries in London by 2041 — specifically calls out the role of construction logistics in urban road safety.

For fleets operating on London construction projects, CLOCS compliance is effectively unavoidable. Major projects — HS2 enabling works, development schemes, infrastructure projects — all specify CLOCS as a minimum. Transport for London’s guidance to operators reinforces the expectation of both legal compliance and best practice behaviour.

AutoKontrol’s TrackSpeed combined speed limiter and GPS tracking system, combined with GeoKontrol zone management, provides a technically robust response to London’s demanding speed management expectations.

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CLOCS Audit Preparation: What Auditors Want to See

CLOCS audits can be conducted by Tier 1 contractors, the CLOCS scheme itself, or third-party auditors. Regardless of who conducts the audit, the evidence requirements are similar:

Policy Documentation

• Written speed management policy
• Evidence of driver communication and training (SUD training records)
• Site-specific speed management procedures

Operational Records

• Speed compliance data covering the audit period
• Site visit records showing vehicle speeds during site approaches and exits
• Any speed events or incidents and how they were addressed

System Documentation

• Speed limiter installation and calibration certificates
• GeoKontrol zone configuration records (which sites, what speed limits)
• Tamper detection records

Driver Training Records

• Safe Urban Driving (SUD) training certificates for all CLOCS-relevant drivers
• Evidence of ongoing speed management training and briefings
• Coaching records for any drivers with speed compliance issues

TrackSpeed and GeoKontrol generate most of this evidence automatically. Fleet managers can produce a CLOCS-ready report pack covering any audit period within minutes.

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Contractual Requirements from Tier 1 Contractors

Tier 1 contractors typically specify CLOCS requirements in their supplier contracts. These requirements often go beyond the CLOCS standard itself and may include:

• Specific speed limits for site approaches (not just within sites)
• Requirements for telematics data to be available for contractor review
• Incident reporting requirements where speed events occur on or near site
• Requirements for fleet management system access to be shared with the contractor

AutoKontrol’s TrackSpeed platform supports contractor data sharing through its API and configurable portal access — allowing fleet operators to grant read-only access to specific vehicle or journey data for contractor compliance teams without compromising operational data security.

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CLOCS and FORS: Working Together

FORS and CLOCS are complementary schemes. FORS Gold is recognised by CLOCS as meeting or exceeding CLOCS requirements in several areas, and many operators pursue both simultaneously.

Speed limiter compliance, driver behaviour monitoring, and the documentation requirements of both schemes overlap significantly. The same TrackSpeed data and reports that support FORS accreditation also provide the foundation for CLOCS compliance evidence — avoiding duplication and reducing the administrative burden of managing two separate compliance programmes.

For a detailed breakdown of FORS speed management requirements, see our companion guide on speed limiters and FORS accreditation.

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Implementation for CLOCS-Compliant Fleets

For construction logistics operators implementing speed limiting for CLOCS compliance, AutoKontrol recommends the following implementation approach:

Step 1: Vehicle Assessment. Identify all vehicles in scope for CLOCS compliance. For most construction logistics operators, this includes all HGVs and larger vans used on project deliveries.

Step 2: System Selection. Standard speed limiting meets the baseline CLOCS requirement. GeoKontrol adds site-specific zone management for operators seeking to demonstrate best practice or operating on contracts with particularly demanding requirements.

Step 3: Site Zone Configuration. Working with your operations team, map all relevant construction sites and define GeoKontrol zones with appropriate speed limits. AutoKontrol’s technical team can assist with zone configuration.

Step 4: Driver Briefing. All drivers must be briefed on the speed management system, the CLOCS requirements, and the monitoring programme. This briefing should be documented with driver sign-off.

Step 5: Audit Trail Setup. Configure TrackSpeed’s automated reporting to generate CLOCS-relevant reports on the schedule required — typically weekly or monthly summaries plus on-demand audit reports.

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Conclusion

CLOCS compliance places real and specific demands on construction logistics operators — particularly in relation to speed management at and around construction sites. Speed limiters are a prerequisite, but GeoKontrol zone speed limiting goes further, delivering the site-specific, GPS-verified speed enforcement that separates credible CLOCS compliance from basic legal minimum.

AutoKontrol’s 30 years of speed limiter expertise, combined with GeoKontrol and TrackSpeed’s data capabilities, provides construction logistics operators with the technology foundation they need to achieve and maintain CLOCS compliance.

Request a free quote to discuss CLOCS-compliant speed management for your construction fleet.