Swept path analysis for a refuse vehicle on a new road

A highways officer asks for a swept path drawing because they are deciding whether a refuse vehicle can collect from your layout without reversing into a bend, mounting a kerb or clipping a tree you have just planted. The drawing has to show a named design vehicle, taken from the collection authority's own fleet where possible, tracked through every movement it will make on the site, with the clearances dimensioned. Where the layout cannot take it, the answer is a redesigned turning head rather than a smaller vehicle, because the collection authority will not change its fleet for one scheme.

Why tracking drawings are asked for

Two separate bodies have to be satisfied, and they want different things. The local highway authority looks at geometry and safety: can the vehicle complete the movement within the carriageway, and is any reversing safe. The waste collection authority looks at operations: will the crew collect from the kerb, how far will they drag bins, and will the round work at the time of day it is scheduled.

Both objections end up in the same consultation response, and both are capable of blocking a reserved matters approval or a section 38 adoption agreement long after planning permission is issued. Get the tracking right at outline stage and the layout survives detailed design. Leave it to a condition and you will be redesigning the last four plots.

Manual for Streets and Manual for Streets 2 are the national reference for residential layout geometry, and most highway authorities publish a local design guide that modifies it. Read the local guide first, because its turning head dimensions and reversing limits are the numbers your drawing will be measured against.

Choosing the design vehicle and its dimensions

Do not invent the vehicle. Ask the collection authority which refuse freighter serves the area, get the overall length, width including mirrors, wheelbase, lock angle and kerb-to-kerb turning circle, and record the source on the drawing.

Three practical points follow.

Mirrors matter more than people expect: the swept width of a large freighter with mirrors out is wider than the body, and it is the mirrors that hit street trees and lighting columns. Overhang matters at the front, where the body sweeps beyond the wheel path on a tight lock. And the vehicle library in your tracking software is a starting point rather than an authority, since a generic refuse vehicle may be shorter than the one that actually serves the street.

Track the other vehicles too. A pantechnicon for removals, a fire appliance, and a delivery rigid all need to get in, and the fire service access requirements in Approved Document B sit alongside the highway requirements rather than replacing them.

Turning heads, hammerheads and banjos

The turning head is where layouts fail. Three forms are in common use, and each has a failure mode.

The failure mode they share is parking. A hammerhead arm that works on the drawing stops working when a resident parks in it, which is why officers ask for the arms to be shown clear of any parking bay and often ask for markings or bollards. Show the parked-car scenario as a second tracking run if you want the objection dealt with in one round.

Where a private drive serves a handful of plots, some authorities accept a collection point at the junction with the adopted road instead of a turning head. That trades a geometry problem for a bin-drag problem, and the drag distance limits in the collection authority's guidance then govern the layout.

Clearances to kerbs, trees and parked cars

A tracked path that touches the kerb line is a fail. Highway authorities set a nominal clearance between the swept envelope and any kerb, wall or column, commonly half a metre, and the local design guide gives the figure.

Vertical clearance is the one that gets forgotten at planning stage and bites at adoption. A freighter needs headroom over the carriageway that no tree canopy, sign, balcony or bridge may intrude into, and the figure highway authorities use is normally around 5 m over the carriageway with a lower requirement over footways. Confirm it locally. Then check it against the mature crown of every tree you have drawn, not the nursery stock size, because the arboricultural and highway drawings have to agree with each other. A Tree Survey and the tracking drawing should be produced by people who have spoken to each other.

Horizontal clearance to street furniture, build-outs, charging points and bin stores needs the same treatment. On a street with one-sided parking, show the running lane width that remains and check the freighter against it.

Reversing distances and the safety objection

Reversing is the safety issue that carries the most weight, and the design answer is to avoid it. Health and safety guidance for waste collection operations treats reversing as a hazard to be eliminated where reasonably practicable, and collection authorities apply their own published limits on how far a freighter may reverse on a new street.

That means your drawing needs to state, in words on the sheet, how the vehicle enters, where it turns, and whether any reversing is required and over what distance. If reversing is unavoidable, show it, dimension it, and explain what makes it safe: forward visibility, absence of a footway on the reversing side, or a banksman arrangement secured through a management plan. Hiding the reversing move is the fastest route to a refusal reason on highway safety grounds.

Where the round timing matters, a Construction Traffic Management Plan covers the build phase, and the operational collection arrangements belong in the transport documents rather than in that plan.

Presenting the drawing so it can be checked

An officer with 40 minutes on your application wants to check the drawing rather than reconstruct it. Make that possible.

1. Name the design vehicle, its dimensions and the source of those dimensions in a title block note.
2. Show the software and vehicle library used.
3. Plot each movement as a separate colour or a separate sheet, with entry and exit arrows.
4. Show the swept envelope including mirrors, and the wheel path, as two distinguishable lines.
5. Dimension the minimum clearance at the tightest point of each movement.
6. Show the layout at the scale of the highway drawing, with kerb lines, parking bays, trees at mature crown spread and street furniture.
7. State the reversing distance, if any, and the assumed lock.

A short covering note in the Transport Statement explaining which vehicle was tracked and why saves an email exchange. On larger schemes the same material sits in the Transport Assessment, which is the document the highway authority reads first.

Where the layout has to change instead

Sometimes the tracking proves the layout is wrong, and the honest response is to move the road rather than to argue.

The common fixes are widening the bend radius at the point of failure, shortening a cul-de-sac so the turning head sits where there is room, converting a hammerhead to a loop, removing one plot to create the turning space, or relocating a bin store so collection happens from the through road. Each of those is cheaper at layout stage than at reserved matters.

Illustrative example: a 14-plot scheme with a 28 m private drive and a hammerhead sized from an earlier scheme. Tracking an 11.5 m freighter showed the front overhang crossing the kerb of plot 9's driveway on exit. The fix was a 1.5 m widening on the inside of the bend plus a no-parking marking in the hammerhead arm, agreed in one round of comments.

And if the section 278 works at the site access are part of the same package, the tracking drawing for the junction usually needs to be produced to the highway authority's technical approval standard rather than to planning standard, as covered in the note on section 278 agreements.

Enter your postcode on PlanScope to see which transport documents a residential layout of your size is likely to need.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.