dash cam for semi truck

Most truck dash cams use a G‑sensor (an accelerometer) or vibration-triggered parking monitoring to detect impacts. When an impact is detected the camera automatically locks or saves the affected video file so it isn’t overwritten during loop recording, preserving incident footage for later review.

Truck dash cams commonly offer resolutions from 720p and 1080p up to QHD (2560×1440) and 4K. Viewing angles typically range from about 140° to 170°, with exact specs varying by model.

Common mounts include suction-cup, surface/adhesive, license-plate or bracket mounts and hardmounts. For long vehicles and trailers many systems offer long extension harnesses or optional extension cables—examples listed in product details include multi‑foot extension cables and 27‑ft extension harnesses—to route power and video to rear or hideaway units.

Many systems support dual recording with a front-facing camera plus a rear or backup camera. Options include dedicated rearview/backup cameras and longer extension cables or mounts to position cameras farther back on trailers or large vehicles.

Some truck dash cams are rated for outdoor exposure (for example IP67 water resistance) and feature waterproof or fog‑resistant designs, wide operating and storage temperature ranges, and durable metal housings for use in varied climates.