# Flock camera vs speed camera vs red-light camera

> A Flock camera records that your vehicle passed a point. A speed or red-light camera exists to issue you a ticket. Different hardware, different law, different consequences.

Source: https://flockcamera.app/guides/flock-camera-vs-speed-camera
Last updated: 2026-08-15

**A Flock camera is a licence plate reader: it records that your vehicle passed a point at a time and stores it in a searchable database. A speed or red-light camera exists to detect a specific offence and issue a citation. Plate readers do not write tickets.**

## The core difference

Enforcement cameras look for an **event**. Plate readers record a **presence**.

A red-light camera watches a stop line and triggers when a vehicle crosses it against a red signal. A speed camera measures velocity and triggers above a threshold. Both exist to produce a citation, and both are built around proving one specific violation happened.

An ALPR triggers on _every_ vehicle. It is not looking for an offence. It is building a record: this plate, this place, this second. The value is in being able to search that record later.

## Side by side

| | Flock / ALPR | Speed camera | Red-light camera |
| --- | --- | --- | --- |
| Triggers on | Every vehicle | Vehicles over a threshold | Vehicles crossing on red |
| Purpose | Searchable record of movement | Citation | Citation |
| Issues a ticket | No | Yes | Yes |
| Typical mounting | Slim pole, ~4 m, often solar | Kerbside cabinet, or a marked van | Heavy mast arm over the junction |
| Signage required | Rarely | Often, by statute | Often, by statute |
| Records make/colour/features | Yes | Not typically | Not typically |
| Who can search it later | Operating agency plus shared partners | Citation processor | Citation processor |

## Why people confuse them

Three reasons. They all sit on poles by the road. They all photograph vehicles. And in a growing number of places, the _same vendor_ supplies several kinds, so nearby units can look related when they are not.

The practical tell is what the lens is aimed at. An enforcement camera is aimed at a specific point - a stop line, a measured stretch. A plate reader is aimed down a lane of approaching or departing traffic, often well back from any junction. See [what a Flock camera looks like](https://flockcamera.app/guides/what-does-a-flock-camera-look-like) for the physical details.

## Why the distinction matters

If you get a ticket in the post, a plate reader is almost certainly not the reason. Plate readers are not a fining mechanism, and treating them as one leads people to worry about the wrong thing.

The reason to care about ALPRs is different, and longer-term: a record of where your vehicle was, retained for a window, searchable by the operating agency and by whoever they share access with. That is a privacy question, not an enforcement one. See [who can access the data](https://flockcamera.app/guides/who-can-access-flock-camera-data).

## What this app maps - and what it does not

Flock Camera maps **plate readers**: the `surveillance:type=ALPR` slice of OpenStreetMap. That is 137,416 cameras worldwide and 127,344 in the US, from Flock Safety and every other brand.

It is **not** a speed-trap or red-light-camera app. Those are a different dataset and a different purpose, and mixing them would make both less accurate. If a pin appears in the app, it is a plate reader as recorded by the community - you can confirm the brand and what it watches by tapping the pin.

### See which is which on the map

Tap any pin for the brand, the operator, the compass bearing and what the camera watches, so you can tell a plate reader from the enforcement camera two poles down.

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Camera data (c) OpenStreetMap contributors, licensed ODbL. Positions and facing directions are community-mapped estimates.

Flock Camera is a free iOS app and an independent project. It is not affiliated with or endorsed by Flock Safety, Inc. App Store: https://apps.apple.com/us/app/flock-camera/id6799255747