Highway Radar

Application that helps with spotting speed traps and road hazards early

Reference and FAQ

How should I configure crowd-sourced alerts server?

We don't provide a service for aggregating real-time crowd-sourced police alerts; instead, we give an application using existing services for getting data. This means that to use police alerts feature in this application, you need to input an address of a server providing the police location.

The server address can be entered in the settings menu under Crowd-sourced alerts → Server hostname field.

NOTE: Despite entering waze.com as a server address will show real-time police alerts directly from Waze, it violates Waze ToS and might be illegal in your country.

How should I configure secondary aircraft server?

Aircraft alerts receive real-time aircraft positions via ADSB-exchange service. Highway radar allows adding a secondary server for aircraft positions. The data from the secondary server are combined with the data from ADSB-exchange to finally get more accurate and complete locations of the aircraft in the sky.

The server address can be entered in the settings menu under Aircraft alerts → Secondary server hostname field. Specifying the secondary server isn't required for the aircraft alerts to work since if this field is empty, only ADSB-exchange + OpenSky network data are used.

NOTE: Despite entering flightradar24.com as a server address will pick aircraft positions directly from Flightradar24, it violates Flighradar24 ToS and might be illegal in your country.

Can I mute/unmute a single alert?

Yes, just tap on this alert to mute or unmute it.

What is the risk level and how predictions work?

Highway Radar uses an array of historical data for estimating a chance of meeting police at this location. The estimation is solely based on past user reports. This feature is experimental now and might not always be 100% precise.

The estimation is a number and a chance of having a police report here and now. For example if it is 2:17 pm now, and the app shows "40-70% in 3mi ±1h" then it means that based on historical data the chance of having at least one police report during the day in a circle around current location with a radius of 3 miles within 1 pm to 4 pm time frame is laying between 40% and 70%.

What is heat map?

Like the risk score, heat maps are computed based on historical police reports data. There two main differences between risk level and heat maps.

First is that heat map doesn't change during the day, while risk score is computed for every hour during the day (e.g. it is often lower during night time and higher during rush hours). The second difference is that risk score scale is uniform throughout the world. Heat maps show information normalized to police activity in the current area (the area changes depending on the map zoom level).

I see an aircraft in the sky but the application is silent.

Highway Radar uses various of techniques to filter out all non-patroling aircraft. For example, the application will check the aircraft model (you'll very unlikely see patrolling A380), check aircraft owner, speed, altitude, and many other parameters. This filtering works really well and filters out >99% of all uninterested aircraft.

You can enable the "Show safe aircraft" option in the settings menu to have all visible aircraft displayed on the screen (has no effect in the map view though). You still won't get any alerts on safe planes (e.g., on passenger aircraft) but will see them on the screen among inactive (gray) alerts.