A rumble device is designed to

رمبل ڈیوائس (rumble device) آواز پیدا کرنے والے آلہ کو ڈیزائن کیا گیا ہے تاکہ

Explanation: A rumble device usually consists of raised markings or strips across the road. It gives an audible, visual and tactile warning of a hazard. These strips are found in places where traffic has constantly ignored warning or restriction signs. They are there for a good reason. Slow down and be ready to deal with a hazard.

Category: Urdu Theory Test Questions

References: Know Your Traffic Signs: Page 75