Update on roadworks for Segro rail freight development

As the development of the rail freight interchange in Radlett continues, motorists can expect more disruption due to roadworks.

65 weeks of works began in February around the North Orbital Road.

Importantly, the A414 North Orbital Road - heading westbound - remains at a 30mph speed limit and on two lanes.

SEGRO has issued the following update regarding ongoing maintenance:

London Colney Roundabout

According to SEGRO, further works on the London Colney Roundabout will commence on May 18, including topping up white lines, markings and some finishing. Much of this will be carried out at night under lane closures so the roundabout remains open.

A414 Footpath and Cycle Link

Works are continuing on the footpath which has temporarily closed the existing one. The order commenced on April 20, and may be in place for up to six months.

The closure is to allow construction of the new path/cycleway along this same line. There is no room to allow construction and safe passage of users as with earlier sections.

A diagram of works can be seen below:

The new footpath on the A414. (Image: SEGRO)

Park Street Roundabout

These works began on March 23, with the majority taking place during daytime hours. They are estimated to take up to 60 weeks. A revised 30mph speed limit and two narrow lane layout on the A414 westbound remains in place.

SEGRO said the contractor team are "working hard" to switch as much of the night works to days as possible.

To date, this has seen five weeks of nights accommodated into day working.

The next block of night working is programmed for the May 26, following the bank holiday.

The main activities include:

• Installation of new deep drainage systems, including chambers, gullies, filter drains, and a large attenuation tank.
• Utility ducting and diversions (Openreach, Cadent, UKPN and BPA).
• Carriageway widening with new foundations, kerbs, and full tarmac construction.
• Resurfacing works, including high‑friction surfacing and new road markings.
• Installation of new traffic signals, detection loops, and associated cabling.
• Footway upgrades including grassed areas, concrete paving, and tactile paving.
• New permanent bollards and galvanised street lighting.

Rail works

There are rail works taking place this weekend. These are on the Midland Main Line near to where it crosses the M25.

Last weekend, there were no Thameslink services between St Albans and London due to works.

Main Site South West Corner

The southern section of the existing bund (as flagged with red markers in the image below) in the south west of the site needs to be removed to allow access to landfill materials.

The southern section of the existing bund (as flagged with red markers) in the south west of the site needs to be removed to allow access to the landfill materials. (Image: SEGRO)

This phase is currently expected to begin week commencing May, 18 following the ecology surveys and if subsequent approval is given to proceed with the works.

Ground landfill materials will be removed as a separate operation and notified in a further update.

General

Moor Mill Fisheries - Countryside Management Consultancy Services (CMCS) is continuing works to improve the lakes health and quality, via silt, brash, oxygenation, American crayfish, lily controls and measures.

CMCS is feeding the existing stock and are looking at the potential to introduce new stock fish to the waters.

Members of the site team and contractors were in and around the Frogmore lakes and Hyde Lane area this afternoon to get Country Park feedback from users - this event was cut short earlier today.