Dash cam laws on windshield mounting and audio

Is it legal to have a dash cam at all?

In general, dash cams themselves are legal to own and use in the overwhelming majority of places. The parts of dash cam use that run into legal questions are not the recording of video through your own windshield, but where exactly the camera and its mount sit on the glass, and whether the microphone is allowed to record other people's conversations without their knowledge.

This guide is general information gathered from published sources, not legal advice, and it does not cover every jurisdiction. Rules differ by state and by country, and they change, so confirm the current rule where you drive before you mount a cam or enable audio.

What do windshield mounting rules generally cover?

Many places that regulate windshield-mounted devices at all focus on how much of the driver's direct forward view the device and its mount are allowed to obstruct, often described in terms of a maximum size or a required placement low in a corner of the glass, commonly behind the rearview mirror or in a lower corner, out of the primary sightline.

Because the exact size limits, the exact zone allowed, and whether dash cams are even named specifically, as opposed to GPS units or toll transponders, differ from one state or country to the next, there is no single mounting position that is correct everywhere. Check your local law, and when in doubt, mount low and small, out of the driver's direct line of sight through the glass.

• General patterns some jurisdictions use, confirm locally: a maximum obstruction size for the device and mount
• A required placement low in a corner of the windshield
• An exception for devices mounted behind the rearview mirror
• Rules that apply to any windshield-mounted device, not dash cams specifically

Is recording audio inside my own car legal?

Audio recording consent law generally comes down to whether a place follows a one-party consent rule or an all-party consent rule. Under one-party consent, a recording is generally lawful as long as one participant in the conversation, which can be you, the driver, knows it is being recorded. Under all-party consent, every participant in a recorded conversation generally needs to know about it.

This distinction matters most for a dash cam's cabin-facing microphone picking up conversations between passengers, or a cam recording someone outside the car who does not know they are being recorded, for example through an open window during a conversation at a stoplight. Which rule applies depends on where the recording happens and where the people involved are, and it is genuinely one of the more state-specific and country-specific areas of this topic, so check your local law rather than assuming your home state's rule travels with you.

Does it matter if I am recording in public versus a private conversation?

Video recording of what is visible from a public road, such as traffic around you, generally raises fewer legal questions than audio recording of a conversation, since there is less of an expectation of privacy for something plainly visible from the street. Audio consent rules tend to focus specifically on conversations, meaning spoken exchanges between people, rather than ambient road noise or a horn honking.

Many dash cam owners choose to disable the microphone entirely, or leave it off by default and only enable it in specific situations, precisely because audio consent law is the part of this topic with the most legal nuance and the most cross-state and cross-country variation.

What should I actually do before I mount a cam or turn on audio?

None of this is legal advice, and the patterns above are general, not a summary of any one state or country's actual code. A quick search of your state's vehicle code or department of motor vehicles site, or a call to a local attorney if the answer genuinely matters for your situation, is the reliable way to get a current, accurate answer for where you live.

• Check your state or country's current windshield-mount device rules before choosing a mounting spot
• Check your state or country's current audio recording consent rule before enabling the microphone
• If you cross state or national lines regularly, check whether your default settings still comply where you are driving
• When in doubt, mount low and out of the direct sightline, and leave audio recording off until you have confirmed the local rule