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Project Example

S278 Interface External Works Package

Project examples show how common groundworks packages may be scoped, sequenced and coordinated. They are illustrative scenarios rather than individual client case studies.

This scenario covers an S278 interface external works package in Kent, connecting development infrastructure to the public highway. A typical package would deliver approved junction, footway and carriageway works under controlled traffic management.

S278 Interface External Works Package — illustrative construction imagery

Project at a glance

Type
S278 highway interface works
Sector
Highways / development external works
Location
Kent
Package
Junction, footway and carriageway adjustments
Constraints
Approvals, traffic management, on-site ties
Stage
S278 highway works stage

Project scenario

S278 works sit on the public network, so approvals, traffic management and highway standards govern the package as much as the developer’s programme. Levels must also meet the on-site roads cleanly.

Assessment usually starts with agreement status, approved highway drawings, temporary traffic management and how construction phasing will keep the network safe.

Interfaces with other trades

Highway authorityDeveloper / principal contractorOn-site roads and sewers packageStatutory undertakersTraffic management designer

Likely scope of works

  • Carriageway and footway alterations to approved drawings
  • Kerbs, crossings and junction geometry
  • Highway drainage adjustments as specified
  • Traffic management during works
  • Tie-in levels to on-site roads
  • As-built records for the highway authority

A typical package would be scoped through section 278 contractors in Dartford, building the approved off-site works and coordinating level ties back into the site.

On-site road continuity usually depends on roads and sewers in Dartford so the S278 interface does not leave a level or kerb mismatch.

How the package could be sequenced

  1. 1

    Agreement check

    Confirm S278 status and approved details.

  2. 2

    TM setup

    Install traffic management for the agreed phases.

  3. 3

    Highway works

    Construct carriageway, footway and drainage adjustments.

  4. 4

    Interface tie-in

    Match levels to on-site roads.

  5. 5

    Records and clear-down

    Issue as-builts and remove temporary TM.

Site constraints

Highway approvals

Works should follow locked S278 drawings and conditions.

Traffic management

Public network safety dictates phasing and working hours.

Level ties

On-site roads must meet highway thresholds accurately.

Statutory undertakers

Existing services in the highway can reshape dig sequencing.

Information we would need

  • Extent of carriageway / footway works
  • Traffic management duration and complexity
  • Highway drainage adjustments
  • Statutory undertaker diversions / protections
  • Materials to highway specification
  • Night or restricted-hour working
  • As-built survey and authority attendances

Risks and decisions to resolve

1Starting works without full S278 approvals
2Level mismatch between highway and on-site roads
3Undertaker conflicts discovered late in the dig
4Traffic management that cannot support the construction method

What the package should leave ready

The package should leave the highway works at the approved stage, with traffic management cleared and interface levels ready for on-site roads and any residual adoption actions.

When this kind of package is needed

This package usually applies when a development needs formal highway works under a Section 278 agreement to connect safely to the public network.

If you are assessing section 278 works for junctions, footways and carriageway adjustments on a development tying into the public highway, share the information you have and we can help identify the right next step.

Discuss a Similar Project

Related services and technical reading

See section 278 contractors in Dartford, roads and sewers in Dartford for on-site continuity, and commercial groundworks in Dartford where private external works meet the highway boundary.

Similar project types

Have a similar project?

Have a similar project? Send us the location, drawings or scope and programme information you have. We can review the requirement and identify the appropriate next step.