SMP Alliance M6


SMP Alliance M6 Junctions 21a/26

Costain, the smart infrastructure solutions company, announces the award of the M6, J21a – J26, smart motorway contract by Highways England.

Under the contract Costain will design and deliver the smart motorway scheme across a 16km length of the M6 to increase capacity and improve journey reliability on this strategic highway.

The scheme will involve the installation of road-side technology and new infrastructure focused on improving the driver experience.


Define scope of works with client and agree cost plan and programme of works for the project

Installation of site facilities

Establish site HV / LV mains and sub mains distribution equipment and cabling systems

Installation of a low voltage (415 volts) power distribution network for the construction site wide

Electrics, main project offices, welfare accommodation and security fence line system

Maintenance and adaptions to the temporary M&E services throughout the project including the addition of LV commissioning/testing supplies

Phased removal of all temporary M&E installations.


Design input

Cost planning

Innovative and cost effective solutions


1 x HV switch panel

1 x HV 11 kV / 415 volts package substation in conjunction with ENWL

Associated earthing systems

LV (415 volts) mains and sub mains cable distribution network

Supply and installation of LV mains and sub mains distribution units

Electrical connections to site offices, welfare facilities and subcontractor’s project accommodation units

Electrical power operation fed via load demand Diesel generators until mains power was available

Electrical testing, inspection and maintenance.


Water and waste connections to project accommodation offices and welfare units

Effluent waste pipe installation to permanent discharge outlets


CCTV installations (electrical supplies)


Health, Safety and Environmental audits and reporting

Operatives Tool Box Talks

Production of Method and Risk Assessments

Adaptions to temporary M&E services

Maintenance of project temporary M&E services

Breakdown cover

Completion and subsequent periodic testing and inspections of all temporary M&E installations including certification and reports throughout the project duration