- Location
- Carrickfergus, County Antrim
- Main postcode district
- BT38
- Nearby (straight line)
- Newtownabbey (6 miles), Bangor (7 miles) and Larne (9 miles)
- Survey and quote
- Free, with a fixed written quote
Dock traffic lights are red and green signals mounted outside and inside a loading bay to tell the driver and dock staff when it is safe to move or load. Interlocks are control links that stop equipment operating out of sequence, for example preventing the door opening until the trailer is restrained, or the leveller operating until the door is fully open.
What should sites in Carrickfergus consider?
Food and chilled operations around Carrickfergus with inflatable shelters often add interlocks so the shelter only inflates once a trailer is docked and restrained. Distribution centres near Carrickfergus taking trailers from many different hauliers benefit from a signal every driver understands, regardless of language or familiarity with the site.
Sites around Carrickfergus that run night shifts often find traffic lights easier for drivers to read than staff waving or knocking on the cab door.
We never ask you to commit before you have a fixed price. A free survey at your Carrickfergus site comes first, followed by a written quote. When the order goes ahead, we plan the installation around your operation, book any out-of-hours working you need and manage the specialist installation engineers on site. The job ends with a full test, a run-through for the people who will use the equipment and a set of handover documents.
What happens on site when traffic lights and interlocks are fitted?
Fitting lights and interlocks is mainly electrical work, and each bay is out of use while its controls are connected and tested. Working bay by bay keeps the rest of the dock running.
- Fix the signals: the outside light is mounted on brackets at a height drivers can see, and the inside light beside the door.
- Run the cables: wiring is run in conduit or trunking between lights, sensors and control panels.
- Isolate and connect: the door and leveller supplies are isolated and locked off while the interlock wiring is connected, or a new bay panel is fitted.
- Test every sequence: each interlock is tested, including what happens if a step is attempted out of order.
- Brief staff: dock staff are shown the new sequence, and signs are fitted for drivers.
It helps if you can provide any electrical drawings for the dock, access to the distribution board, a person who can authorise isolations and an agreed order for releasing bays.
What does HSE guidance say about stopping drivers leaving too early?
HSE guidance (followed by HSENI in Northern Ireland) says there should be safeguards against drivers driving away from a loading bay too early, and it names traffic lights as one of the measures. Vehicle or trailer restraints, and the person in charge keeping keys or paperwork until it is safe, are the others listed in HSE's guide to workplace transport safety (HSG136) and its loading factsheet.
Traffic lights are a signal, not a physical barrier, so they work best as part of a clear procedure or alongside a restraint. Your risk assessment should decide the combination. In Northern Ireland the regulator is HSENI.
Interlocks also touch on door safety law. Under regulation 18 of the Workplace (Health, Safety and Welfare) Regulations 1992, or the Northern Ireland 1993 equivalent, powered doors need suitable and effective features to prevent them trapping anyone. Interlocks must never bypass those features, and door control work should respect BS EN 12453, the standard for safety in use of power-operated doors.
Read more in our guide to preventing drive-away and trailer creep.
The same published guide range applies across Northern Ireland; access, out-of-hours working and site conditions are confirmed at the free survey.
Survey checklist for your dock
- Access for deliveries, cranes or lifting equipment during installation
- Headroom above the opening and which track type will suit it
- Traffic routes for vehicles and separation of pedestrians
- Temperature requirements for chilled, frozen or ambient goods
- Dock height and the mix of trailers you load
- Lighting inside trailers and at the dock face
Options to discuss
Trailer presence sensors
Sensors that detect a trailer on the bay, used to switch lights, enable the door or trigger an inflatable shelter where no restraint is fitted.
Door-linked lights
Lights that change automatically with the door position, using a door switch or a signal from the door control panel, so the outside light turns red as the door opens.
What do the rules in Northern Ireland mean for the work?
In Northern Ireland, the CE mark (or CE with UKNI) applies to powered doors and dock equipment. We hand over the documentation for each item fitted in Carrickfergus, and because building control and planning are handled by the council, we check what applies at survey before any dates are set.
Questions about dock traffic lights and interlocks in Carrickfergus
Can you work alongside our main contractor on a new build in Carrickfergus?
Yes. For new warehouses and fit-outs, we can supply and install the dock package as part of a wider project, working to the main contractor's programme, site rules and permits. We will need drawings, dock levels and the programme, and we coordinate pit details, power supplies and door openings with the relevant trades before installation begins.
How do you price dock traffic lights and interlocks for a site in Carrickfergus?
Guide budgets for supply and fit are £650 to £3,400 per bay, excluding VAT. The figure moves with size, insulation, the operator, electrics, access, any pit or groundworks and out-of-hours working. Where levellers are involved, the guide assumes an existing, sound pit. After the free survey you receive a fixed written quote, and that is the price for the agreed scope.
Do you remove and dispose of the old equipment?
Yes, where it is part of the scope. When we replace doors, levellers, shelters or seals at a site in Carrickfergus, removal and disposal of the old equipment can be included and is itemised in the quote, so it is clear what is covered. If anything should be kept, such as a frame or motor that is still serviceable, we agree that at survey.
Which way round do the inside and outside lights work?
The inside and outside lights always show opposite colours. While a trailer is being loaded, the outside light is red so the driver stays put and the inside light is green so staff can work. When loading is finished and the door is closed, the inside light turns red and the outside light turns green for the driver.
Can interlocks be fitted to a manual loading bay door?
Yes. A door position switch fitted to a manual door can confirm when it is fully open or fully closed. That signal lets the traffic lights change automatically and stops the leveller being raised until the door is out of the way.
Dock traffic lights and interlocks near Carrickfergus
Close neighbours of Carrickfergus with their own pages here: Newtownabbey (6 miles), Bangor (7 miles) and Larne (9 miles). Choose one to see coverage details for that town.
Other loading bay services in Carrickfergus
Full guide to dock traffic lights and interlocks · Everything we do in Carrickfergus
Send a few photos of the dock and a short description of the problem, and we will come back to you about your Carrickfergus site.