Case study — Traffic management
The first EMCC vehicles, built for Chevron
When Chevron Traffic Management needed its first fleet of Enhanced Mobile Carriageway Closure vehicles, they came to Dack. We designed the vehicles, sourced and supplied the base vans, and hand-built the fleet at our Lincoln conversion centre.
What is an EMCC?
A safer way to close a live carriageway
An Enhanced Mobile Carriageway Closure (EMCC) is a National Highways–accepted technique that lets traffic management crews create a short, traffic-free working window on a live carriageway — up to nine minutes — without a full rolling roadblock or lengthy diversion.
The EMCC vehicle deploys authorised signage to hold traffic, while the crew ahead installs, switches or removes traffic management. Road users typically wait just three to five minutes — in one trial alone, the technique avoided diverting more than 10,000 drivers through local roads. The vehicles operate with incursion prevention and warning technology (IIPAWS®) and onboard CCTV to protect the workforce ahead.
The technique was pioneered by Chevron Traffic Management and partners, validated across thousands of uses on National Highways regions, and recognised with the 2022 National Highways Chairman's Award for innovation.
What we delivered
Designed, supplied and
built as a fleet
This was a complete vehicle programme, not just a fit-out. We worked with Chevron from specification to handover — and because the vans carry their crews through long shifts on the network, every vehicle includes full onboard welfare.
- Base vehicles sourced and supplied — Ford Transit crew vans
- Vehicle design developed with Chevron’s TM specialists
- Roof-mounted lane closure signage, deployable from the vehicle
- Rear Highway Maintenance boards with Chapter 8 chevrons
- Beacons, safety lighting and rear protection mesh
- Crew work area with table, seating and charge points
- Onboard welfare — toilet, hot handwash and hygiene station
- Galley with microwave, sink and hot & cold water
- Equipped to operate with incursion-warning technology (IIPAWS®) and CCTV
Inside the EMCC
A shift's worth of welfare, on board
Crew seating and a working table, a galley with hot water and microwave, and a proper washroom — so the closure crew stays safe, fed and on site.
More about EMCC
Read about the technique
EMCC is an industry innovation with its own story — these articles from the companies behind the technique cover the trials, the technology and the results.
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