The police sketch plan and key

The police sketch plan is a rough diagram of how a road accident happened, showing the road, the vehicles involved and the likely point of impact. The key is the short legend that explains what each mark on that diagram means. Together they turn a scene only a few people witnessed into a document anyone reviewing your road accident claim can actually read.

What goes into the sketch itself

Police normally draw the sketch after attending the scene or reviewing your report, plotting the road, junctions or lane markings, and where each vehicle came to rest.^[1] Arrows usually show the direction each vehicle was travelling before impact.

The point of collision is marked, often with a simple symbol, so the layout can be understood at a glance later. None of this is meant to be artistic. It is a working record, not a formal drawing.

What the key is actually for

A sketch full of numbers and symbols means little without an explanation. The key lists what each numbered item represents, such as a vehicle type, a direction of travel, or a road feature like a divider or a junction.

Reading the sketch and the key together lets someone who never saw the accident, such as an adjuster or a judge, follow exactly how it is said to have unfolded.

Why this document matters for a claim

The sketch plan sits alongside your police report as part of the early record of what happened. It matters most when accounts differ, since it was prepared close to the time of the accident rather than reconstructed later from memory.

An independent diagram can support your version of events, or at least narrow down what is genuinely disputed. That narrows the work everyone still has to do later in the process.

How and when to request a copy

You can generally ask for a copy from the police station or district police headquarters (IPD) handling your case, referencing your report number. Processing can take time, so it is worth asking early rather than after a settlement offer has already arrived.

A lawyer acting for you can often make this request as part of pulling together the wider documents you need for your file.

When there is no sketch plan at all

Not every accident produces a full sketch, particularly minor ones without serious injury. In that situation, your claim still rests on the police report, any photographs from the scene, and witness statements.

A missing sketch narrows one source of evidence. It does not by itself decide whether your claim succeeds.

What to do once you have it

Check the sketch and key against your own memory of the accident soon after you receive them, while details are still fresh. Raise any real disagreement early, through your lawyer if you have one, rather than after an offer has been made.

Keeping this document with the rest of your paperwork is one part of building your claim file properly from the start.