Advanced Scenarios

Where a development accesses the road network at or near a National Cycle Network route, the swept path must confirm that vehicle movements do not encroach on the cycle route. Cyclists on NCN routes may be present at any time, and conflicts between turning vehicles and cyclists are serious safety risks. The swept path analysis should show the vehicle movement and the cycle route simultaneously.

At a railway level crossing, vehicles must cross the railway tracks safely. The swept path confirms that the crossing geometry is adequate for all vehicles likely to use it — particularly long vehicles that must clear the track in a single movement without stopping on the crossing. The swept path must show the vehicle from the approach, through the crossing, and clear on the other side.

A gyratory is a one-way road system circulating around a central area. Swept path analysis at a gyratory checks that vehicles can navigate the entry points, follow the circulatory carriageway, and exit safely without conflicting with pedestrians crossing between the central island and the surrounding buildings.

A bus gate is a road junction feature that allows buses and authorised vehicles to pass through but restricts general traffic. Swept path analysis at a bus gate confirms that buses can pass through the gate opening safely. The gate must be wide enough for the bus body with adequate clearance on both sides.

Farm accesses onto trunk roads must meet National Highways standards, which are more demanding than local road standards. The swept path analysis uses the agricultural vehicle dimensions relevant to the farm operation — tractors, trailers, and combine harvesters. The analysis must show that these vehicles can safely enter and exit the access without conflicting with high-speed trunk road traffic.

When a construction phase requires a temporary road closure, traffic is diverted via alternative routes. Swept path analysis of the temporary diversion routes confirms that all vehicles — including HGVs and buses diverted from the closed road — can safely navigate the alternative routes.

A listed gate has heritage value that must be protected. The gate opening dimensions and the approach geometry determine what vehicles can pass through. Swept path analysis confirms the maximum vehicle size that can use the gate without modification, or quantifies exactly how much modification is needed to accommodate required vehicles — the minimum intervention argument.

Marina berths are accessed by boat owners and maintenance vehicles. The access road must accommodate trailers and boat transporters as well as standard cars. Swept path analysis for marina berth access checks that the largest trailer configuration used at the marina can navigate the site access, the internal road, and the launching ramp or storage area.

Race circuits require access for car transporters, recovery vehicles, and paddock service lorries. The approach road and paddock access must accommodate these large vehicles safely. Swept path analysis for a race circuit covers the external access junction, the internal paddock road, and specific areas such as the scrutineering bay and truck park where multiple large vehicles must manoeuvre simultaneously.

Wind turbine delivery requires abnormal load vehicles carrying tower sections, nacelles, and blades. Turbine blades in particular can be 60–70 metres long and require very large swept paths. Access roads to wind turbine sites must accommodate these abnormal loads. Swept path analysis covers the entire route from the public highway to the turbine base, checking every bend, junction, and narrow section.

A helicopter landing pad requires vehicle access for refuelling tankers, maintenance vehicles, and emergency response vehicles. Swept path analysis covers the access route to the pad and the manoeuvring area around the pad for these vehicles. The swept path must keep vehicles clear of the rotor disc area and the approach and departure flight paths.

An EV bus or van depot requires swept path analysis for the vehicles using the depot — typically full-size buses or delivery vans. The internal circulation, charging bay access, and workshop access must accommodate all vehicle types. Articulated trucks delivering vehicle parts may also need to be checked at the main access.

Power substation access must accommodate heavy transformers and specialist electrical equipment deliveries — typically abnormal load vehicles. The access road must be designed for these loads from the outset. Swept path analysis confirms that the transformer delivery vehicle can reach the substation and manoeuvre for unloading.

Large generators for data centre backup power are delivered on low-loaders and positioned with mobile cranes. The swept path analysis covers the low-loader approach to the delivery point and the mobile crane positioning. The access road must accommodate the low-loader with the generator on board, which may be significantly wider than the tractor unit.

Industrial plant access for refineries and chemical facilities must accommodate specialist tanker vehicles, abnormal load deliveries, and emergency response vehicles. Security gates and weighbridge facilities create specific swept path challenges. The entire vehicle circuit — entry, weighbridge, process area, and exit — must be checked for all vehicle types.

Urban hospital helipad access is particularly challenging because the available space is constrained by the hospital building and adjacent structures. The approach route for ambulances from the helipad to the emergency department must be clear of the helicopter's operational envelope. Swept path analysis confirms that ambulances can access the helipad and that other vehicles cannot inadvertently block the approach.

Drone delivery hubs require access for conventional vehicles — vans for initial delivery of parcels to the hub, and maintenance vehicles. The swept path analysis covers conventional vehicle access. The drone operational zone is separate but must not conflict with vehicle movements. The hub layout must allow vehicles to load and unload without vehicles entering the drone operational area.

A modular housing factory delivers completed room-sized modules on flatbed lorries. The factory access must accommodate regular lorry arrivals and departures. The manufacturing area must have internal access for forklifts and cranes moving modules between production stages. Both external access and internal logistics must be swept path checked.

An international lorry park accommodating HGVs of various national specifications must be designed for the largest vehicles that could legally use it. European vehicles may have different dimensions from UK vehicles. The lorry park layout must accommodate all vehicle types safely, with adequate turning areas and bay dimensions.

Research vessels require specialist equipment loading — including large scientific instruments, submersible vehicles, and bulk supplies. The dock access must accommodate the lorries, cranes, and specialist vehicles used in research vessel operations. Swept path analysis covers the port access road and the dock area where these operations occur.