Section 59 claims for extraordinary traffic damage

Section 59 extraordinary traffic claims are the mechanism a highway authority uses to recover the cost of repairing a road worn out by construction traffic. Section 59 of the Highways Act 1980 lets the authority recover extraordinary maintenance expenses from the person by whose order the traffic was conducted, where it can prove that damage was caused by excessive weight or extraordinary traffic passing along the highway.

The claim arrives after the event, usually when the road has already been resurfaced, and the developer is then arguing about causation with no baseline. That is avoidable, and the avoidance costs a day of survey work before the first lorry arrives.

What extraordinary traffic means

The phrase is relative, not absolute. Traffic is extraordinary by comparison with the ordinary traffic of that particular highway, judged on character and weight rather than on volume alone.

So 30 articulated deliveries a day on an unclassified lane whose normal use is a dozen cars and a tractor is plainly extraordinary. The same vehicles on a distributor road already carrying heavy goods traffic are not. A rural road that serves a quarry has a higher threshold than an identical road two miles away that does not.

Two consequences for a developer. First, the character of the existing traffic is a factual question and the evidence for it is worth collecting, because it is the first limb of any defence. Second, concentration matters: the same total tonnage spread over two years is less likely to be characterised as extraordinary than the same tonnage delivered in a six-week earthworks campaign.

The power to recover and its limits

The authority has to prove three things: that it incurred extraordinary expenses in maintaining the highway, that the damage was caused by excessive weight or extraordinary traffic, and that the claim is against the person by or in consequence of whose order the traffic was conducted.

Each limb bites.

• Extraordinary expenses means expenditure beyond what the authority would have incurred anyway. A road already at the end of its serviceable life was going to be resurfaced regardless, and the claim should reflect only the accelerated element.
• Causation has to link the damage to the traffic. Where a bus route, a farm and a waste transfer station share the road, the authority's apportionment is open to challenge.
• The person who ordered the traffic is usually the developer or the main contractor, and the contractual allocation of that risk between them is a matter for the building contract rather than for the authority.

Section 59 also allows a person to agree a sum with the authority in composition for liability under the section, which is the route most schemes take and the one worth proposing first.

The time limits

Proceedings have to be brought within 12 months of the damage being done. Where the damage results from a particular building operation or from the transport of heavy materials over a period, the period runs instead from completion of that operation or transport, and is shorter.

Diary both dates. Keep a dated record of when the heavy haulage phase started and finished, and of practical completion, because the start of the limitation period depends on facts the developer holds and the authority does not.

A claim intimated outside the period is not a claim, and authorities do sometimes write after the time has expired.

Condition surveys before anything moves

This is the single most useful protective step, and it takes a day.

1. Walk and film the entire haul route before any construction traffic uses it, with continuous video and stills at fixed intervals.
2. Record every existing defect with a location reference, a dimension and a photograph: cracking, rutting, edge deterioration, failed patches, settled ironwork, damaged kerbs and verges.
3. Record the surrounding assets too: gullies, signs, bollards, trees, boundary walls and any street furniture within striking distance.
4. Date and sign the record, and offer the authority a copy with an invitation to inspect jointly or to comment within a stated period.
5. Repeat the survey at agreed intervals during the works and again at completion.
6. Measure deflection or residual pavement life at a few locations if the route is marginal, because an authority claiming accelerated failure has to engage with the pre-existing condition.

An authority that declines to attend a joint inspection has weakened its own position, and a dated unilateral survey it was invited to comment on is close to as good as an agreed one.

Agreeing a route and a monitoring regime

Negotiate the route rather than letting the contractor choose it.

Agree the haul route in writing, with a plan, and name the roads to be used and those to be avoided. Set a vehicle size and weight limit for the route, and a maximum daily movement figure. Fix wheel washing and sheeting requirements, and the arrangements for cleaning the carriageway, since depositing mud on the highway is an offence in its own right regardless of any section 59 liability.

Then set the monitoring: who inspects, how often, what is recorded and how a defect is reported and remedied. Where a defect is attributable and the developer repairs it promptly under the authority's permit arrangements, the eventual claim shrinks to the residual effect rather than the whole resurfacing.

Where highway works are being delivered anyway, the interaction with the works agreement is worth thinking through, and the bonding mechanics are set out in section 278 bonds and how the sum is calculated. A section 278 agreement does not discharge section 59 liability, and structures on the route may need their own approval, as covered in technical approval for highway structures on an estate.

How this sits alongside construction conditions

Planning conditions and section 59 do different jobs, and conflating them creates gaps.

A Construction Traffic Management Plan condition can require a route, movement limits, wheel washing, condition surveys and a remediation procedure. What it cannot do is require the payment of money, because conditions cannot impose a financial obligation.

So the money sits elsewhere: either in a planning obligation, or in a separate composition agreement under section 59, or in a dilapidation deposit held against the route. Decide which before permission is granted, because retrofitting a payment mechanism afterwards means a deed of variation or a negotiation from a weaker position.

The wider site arrangements, including hours, compound location, parking for operatives and dust and noise management, belong in the Construction Management Plan, and the two documents should cross-reference rather than repeat each other.

Settling a claim without litigation

Most claims settle, and the sequence that works is consistent.

Ask for the authority's evidence first: the maintenance records for the route before the works, the inspection reports, the specification and cost of the works carried out, and the basis on which the extraordinary element has been identified. Then compare it with your baseline survey and your haulage records.

Offer a joint inspection with the authority's engineer and an independent pavement specialist. Where the pre-existing condition was poor, propose an apportionment reflecting residual life rather than disputing liability outright, since a developer arguing that heavy construction traffic caused no damage at all rarely persuades anyone.

Then convert the agreement into a composition payment or a scheme of works under the section, with a release on completion. Recording the agreement in writing, with the route and the period it covers, prevents a second claim on the same facts.

Enter your postcode on PlanScope to see which transport and construction documents your scheme is likely to need.

This is general guidance, not legal advice: check the position with your local planning authority, the highway authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.