New Delhi, Sept. 22 -- A dashcam can record what happens on the road when you are driving or, with the right setup, when your car is parked. From accident evidence and traffic incidents to unexpected damage, a camera can provide a video record when it is difficult to rely only on eyewitness accounts. But dashcams differ widely in video quality, camera coverage, night recording and parking features. Here is what to look for before choosing one for your car.

A dashcam continuously records the road ahead while you drive. If an accident, sudden braking incident or other road event takes place, the footage can help you understand what happened.

A front camera records the road ahead, while dual-channel models can also record behind the car. S...