One of this week’s free challenges in Fortnite: Battle Royale asks you to go through five different Radar Signs at full speed, causing them to play a siren sound.

Each Radar Sign has its own speed limit to adhere to, but you’re only going to need to go as fast as 27 MPH to finish the challenge. It’s also worth mentioning that the signs register all speeds, so if you pass them while flying on your glider, that might be enough to trigger the alarm.

Here is where you can find each Radar Siren, so long as you can find a car first.

West of Lazy Links

This one is a bit out of the way, but you can grab this and the other Radar Sign near Tilted Towers on the same stretch of road.

North of Titled Towers

Just follow the road North, it can’t be missed.

Between Dusky Divot and Tomato Temple

Just south of the underground tunnel between the two areas.

West of Salty Springs

Just beside the “S” in Salty on the half-broken road.

Southwest of Paradise Palms

You can find this one near the bridge southwest of Paradise Palms, be sure to dodge all the stationary cars.

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