Who decides access: the highway authority's role

The council that grants your planning permission is usually not the body that decides whether your access is acceptable. On a minor residential scheme the local planning authority determines the application, while the local highway authority answers as a consultee, and on highway authority planning access questions its answer tends to settle the point. Work out which body holds the highway function for your road before you draw the access, because the geometry it expects is published and the standards rarely bend.

In a two-tier area the county council is the highway authority and the district or borough is the planning authority. In a unitary, metropolitan or London borough the same council does both, although the two teams sit apart and often disagree. Motorways and trunk roads belong to National Highways. In London, the Transport for London Road Network and the red routes are controlled by Transport for London rather than the borough.

Two authorities, one application

The highway authority does not grant or refuse anything. It gives advice, the case officer weighs it as a material consideration, and the decision stays with the planning authority. That sounds like room for argument, and sometimes it is.

In practice a sustained highway safety objection is close to fatal. The National Planning Policy Framework, re-issued on 17 August 2026 with policy-coded chapters in place of paragraph numbers, keeps the long-standing test that an application should only be refused on transport grounds where there would be an unacceptable impact on highway safety, or where the residual cumulative impacts on the road network would be severe. Check the exact wording and the policy code in the current edition on gov.uk before you quote it in a statement, because the renumbering caught a lot of people out.

That test cuts both ways. An objection about inconvenience, or about one more car on a quiet street, does not meet it. An objection that your visibility splay falls short of the recorded vehicle speeds does.

When the highway authority has to be consulted

Article 18 of and Schedule 4 to the Town and Country Planning (Development Management Procedure) (England) Order 2015 set out the statutory consultations. For highways the triggers are development likely to result in a material increase in the volume or a material change in the character of traffic using a classified road, and development involving the formation, laying out or alteration of an access to a classified road.

Two things follow from that. A new access onto an unclassified residential street is often not a statutory consultation at all, though most councils consult their highways team anyway as a matter of practice. And a single dwelling with a new access onto a C road or a B road does trigger it, which is why small schemes on classified roads attract more highway scrutiny than much larger schemes behind an existing estate road.

Development affecting the strategic road network goes to National Highways. Its role, and the circumstances in which it asks for conditions or for a decision to be held back, are set out in Department for Transport Circular 01/2022. Statutory consultees get 21 days to respond, and a late response still has to be considered if it arrives before the decision.

Standing advice and what it really means

Many highway authorities publish standing advice for householder and small-scale applications so that they do not have to comment case by case. The planning officer then applies the published document directly.

Read it before you design the access. If your scheme meets the standing advice, say so explicitly in your Transport Statement and show the dimensions on a drawing. If it does not, assume the officer will notice, because applying standing advice is the cheapest part of their day.

Silence from highways is not consent. Where standing advice applies there may be no consultation response on the file at all, and an applicant who reads that as approval is reading nothing.

Visibility splays and access geometry

The splay is described by two distances. The x-distance is the set-back from the edge of the carriageway, commonly 2.4 metres for a residential access in Manual for Streets. The y-distance runs along the nearer edge of the carriageway in each direction and is derived from stopping sight distance for the speed vehicles actually travel, not the posted limit.

That distinction decides a great many householder refusals. Where an authority refuses on visibility, the usual remedy is a speed survey measuring wet-weather 85th percentile speeds, which can justify a shorter y-distance than the authority first assumed. Higher-speed roads are assessed against the Design Manual for Roads and Bridges rather than Manual for Streets, and the numbers jump sharply.

Beyond the splay, the recurring asks are a minimum access width, a bound surface for the first few metres so loose material is not carried onto the carriageway, a gradient the authority will accept, turning space so a vehicle can enter and leave a classified road in forward gear, and a bin presentation point within the collection distance the waste team uses. None of these are negotiable by argument. They are negotiable by drawing.

Turning a highway objection around

1. Get the consultation response in full from the public file rather than relying on the officer's summary of it.
2. Separate the safety points from the standards points. Safety points need design changes. Standards points can sometimes be answered with survey evidence.
3. Commission a speed survey where the y-distance is the dispute, and a swept path or tracking drawing where turning or servicing is.
4. Amend the plans and send them to the highway officer directly, with the planning officer copied in, before the formal re-consultation.
5. Offer condition wording yourself. A splay condition that ties the dimensions to a named drawing is easier for an officer to accept than a vague one.

Off-site work changes the shape of the problem. If the authority wants a footway extension, a crossing point or a visibility improvement on land it controls, that comes through a section 278 agreement with its own fees and timetable, and the planning permission will carry a Grampian condition stopping you from starting until the agreement is in place. Where a contribution rather than physical work is sought, it arrives through a planning obligation, and section 106 monitoring fees sit on top of the sum itself.

An illustrative example. A self-builder proposes one dwelling on a garden plot fronting a 30mph B road, showing 2.4 by 43 metre splays taken from a design guide. Highways objects because measured speeds are 36mph. A seven-day survey confirms the speeds, the splay has to grow, and the only way to find the extra length is to reposition the access three metres north and lower a section of hedge that the applicant does not own. The scheme survives, four months later, with a hedge-removal agreement and a revised block plan.

Works in the highway are a separate consent

Planning permission does not authorise you to touch the public highway. A dropped kerb needs a licence under section 184 of the Highways Act 1980, applied for through the highway authority and built by its approved contractor or under its supervision. Doing it without the licence is an offence and the authority can reinstate the kerb at your cost, which is the sort of thing that surfaces during enforcement complaints from neighbours.

Utility connections, scaffolding licences, skip permits and temporary road closures all sit with the highway authority too. Budget time for them rather than discovering them in week one on site. This is general guidance, not legal advice, so check the position with your local planning authority and the highway authority before relying on it.

Two-tier areas and who to speak to

Where the county is the highway authority, its development management team usually has a published pre-application service and a charging schedule separate from the district council's. Using both is the single cheapest piece of risk reduction available on a small scheme with a new access, because the highway view arrives before you have paid an architect to draw the wrong thing.

National Park authorities are planning authorities but not highway authorities. Development corporations may hold planning powers while the county or unitary keeps highways. In each case, ask one question at the start: who writes the highway response on this road, and is their standing advice or design guide published.

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