Construction traffic routing, wheel washing and hours

A construction traffic routing plan has to prove three things to the highway authority: that heavy goods vehicles can reach the site without using unsuitable roads, that they will leave the highway clean, and that they will arrive and depart within hours the council can defend to neighbours. Everything else in a construction traffic management plan sits around those three points. Get them wrong and you discharge the condition twice, which on a site with a fixed start date costs more than the plan did.

Councils rarely refuse permission over construction traffic. They condition it, and the condition is where the work lands.

What the plan has to demonstrate

The highway authority is not assessing your construction logistics for efficiency. It is checking that the public highway is not damaged, obstructed or made less safe during the build.

That means the plan carries a specific evidence set: the route from the strategic road network to the site entrance, the largest vehicle that will use it, swept path analysis at any junction or pinch point where that vehicle is tight, the access arrangement including visibility and gates, the location of the wheel wash and any road sweeping, the parking and welfare arrangements inside the site boundary, and the delivery management method.

A Construction Traffic Management Plan that describes intentions without drawings gets returned. The officer needs a plan at a readable scale showing the route, the site layout during construction and the vehicle tracking. Write the narrative around the drawings rather than the other way round.

Choosing and evidencing a routing agreement

Start from the roads you want to avoid, not the shortest route. Residential streets with on-street parking, roads with a weight restriction, school frontages during drop-off, and any structure with a weight limit all rule themselves out.

Then evidence the route you have chosen:

• Carriageway widths at the narrowest points, measured rather than scaled off mapping
• Swept path analysis for the design vehicle at every turn where two-way running is not possible
• Weight and height restrictions on the corridor, taken from the highway authority's records
• Any bus route, cycle route or school crossing along the route, with the mitigation you propose
• The point at which vehicles join the route from the strategic network

Where the route is tightly constrained, offer a physical measure rather than a promise. A banksman at a specific junction during specified hours, a temporary suspension of parking bays agreed with the highway authority, or a delivery booking system with a maximum number of arrivals per hour are all enforceable. A sentence saying drivers will be instructed to take care is not.

One legal point to keep in view. Section 59 of the Highways Act 1980 allows a highway authority to recover the cost of excessive maintenance where damage results from extraordinary traffic. A documented route and a pre-construction condition survey are the two things that protect you if that claim is ever made.

Wheel washing and road sweeping arrangements

Depositing mud on the highway is an offence under the Highways Act 1980, and it is the single most common source of complaint about construction sites. It is also the easiest thing to get right.

The plan needs to say which system you are using, where it sits, and how long the run-off distance is between the wash and the highway. A drive-through wheel wash needs a hardstanding approach long enough for water to drain off the tyres, typically a reasonable length of clean hardcore or concrete apron. A dip bath needs a drainage and desilting arrangement. A jet wash operated by a groundworker needs someone rostered to do it, which means naming the responsibility in the plan.

Add a road sweeping commitment with a trigger and a frequency: a sweeper on call during groundworks and demolition, and a scheduled sweep at the end of each working day while muck-away is running. Then say who inspects, and how a complaint reaches someone who can act on it.

Working hours and the usual restrictions

Hours are set by condition and they vary by council, so take the wording from the authority's own standard conditions rather than assuming a national norm. A common pattern is weekday working from early morning to early evening, a shorter Saturday, and no working on Sundays or bank holidays, with tighter hours for noisy operations such as piling and breaking out.

Two mechanisms sit alongside the planning condition. Section 60 of the Control of Pollution Act 1974 lets a local authority serve a notice controlling the way construction work is carried out, including hours. Section 61 lets you apply for prior consent, agreeing the method and hours in advance, which gives protection against a later section 60 notice. On a site with sensitive neighbours and a long demolition phase, a section 61 application is worth the effort.

Reference BS 5228-1 for construction noise prediction and control where the council asks for noise evidence. The same standard's second part covers vibration, which matters on piled foundations near older terraces.

Ask for deliveries to be excluded from the noisiest hours rather than from all restricted hours. A concrete pour that has to start at 7am is a reasonable request if made in advance with a named date, and councils will usually agree a one-off variation. What they will not do is grant a blanket exemption.

Parking for the workforce

This is the part of the plan most often waved through and most often the cause of actual complaints. Trades arrive in vans, and if there is nowhere on site they park on the street.

Quantify it. Estimate peak workforce by phase, state how many vehicles can park inside the site boundary at each phase, and explain what happens at the peak when the ground floor slab is occupied by the crane base. Options include a temporary compound on an adjoining parcel, a permit arrangement with the highway authority, a shuttle from an off-site car park, or a contractual restriction in the build contract.

Where the site cannot accommodate the workforce, say so and propose the mitigation. A plan that claims 30 spaces on a site with room for eight loses the officer's confidence for everything else in it.

Highway condition surveys before and after

Commission a pre-construction condition survey of the route and the frontage before any vehicle arrives. Photograph and video the carriageway, footway, kerbs, gullies, street furniture and any verge, with dated files and a plan showing the extent surveyed.

Repeat it at practical completion. The comparison is what resolves an argument about whether a kerb was already cracked, and it is the evidence that answers a section 59 claim. Offer the survey in the plan as a commitment, because a council that has it in writing is less likely to ask for a highway works bond.

Include the frontage footway even where no works are proposed there. Damage during delivery of scaffold and materials happens at the frontage more than anywhere else.

Discharging the condition without a second round

Most refusals to discharge come from missing detail rather than from disagreement about the approach. Work through the condition wording clause by clause and answer each one in a numbered response.

1. List every requirement in the condition as a separate heading in your submission.
2. Attach the drawing that evidences each requirement, cross-referenced by number.
3. Name the responsible person for each ongoing commitment, by role rather than by name.
4. State the phase to which each measure applies, since a single plan usually covers demolition, groundworks and superstructure with different arrangements.
5. Include the complaints procedure and a contact route that is live during working hours.

Where the site is large enough to need a wider Construction Management Plan covering dust, noise, waste and hoarding, submit the traffic plan as a clearly separated part of it rather than as a separate document with overlapping content. Officers consult the highway authority on the traffic elements only, and a plan that mixes everything together slows that consultation. If your access itself is temporary, the conditions attached to temporary construction accesses are a separate matter to resolve in parallel.

To scope which construction stage documents a scheme is likely to need, enter the postcode on PlanScope and flag the access and highways constraint in the guided questions.

This is general guidance, not legal advice. Check the position with your local planning authority and the local highway authority 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.